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    <rr:ExpenseNarrativeTextBlock contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;This table describes the fees and expenses that you may pay&#13;if you buy and hold shares of the Fund. You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month&#13;period, at least $50,000 in Eaton Vance Funds. &amp;#160;More information about these and other discounts is available from your financial&#13;intermediary and in Sales Charges beginning on page 5 5 of this Prospectus and page 19 of the Fund&amp;#146;s Statement of Additional&#13;Information.&lt;/p&gt;</rr:ExpenseNarrativeTextBlock>
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    <rr:ExpenseExampleHeading contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Example. &amp;#160;&lt;/p&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleHeading contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Example. &amp;#160;&lt;/p&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleHeading contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Example. &amp;#160;&lt;/p&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleHeading contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Example. &amp;#160;&lt;/p&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleHeading contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Example. &amp;#160;&lt;/p&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleHeading contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Example. &amp;#160;&lt;/p&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleHeading contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Example. &amp;#160;&lt;/p&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleHeading contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Example. &amp;#160;&lt;/p&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleHeading contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Example.&lt;/p&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleHeading contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Example. &amp;#160;&lt;/p&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleHeading contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Example. &amp;#160;&lt;/p&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;This Example is intended to help you compare the cost of investing&#13;in the Fund with the cost of investing in other mutual funds. &amp;#160;The Example assumes that you invest $10,000 in the Fund for&#13;the time periods indicated and then redeem all of your shares at the end of those periods. &amp;#160;The Example also assumes that&#13;your investment has a 5% return each year and that the operating expenses remain the same. &amp;#160;Although your actual costs may&#13;be higher or lower, based on these assumptions your costs would be:&lt;/p&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleNarrativeTextBlock contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;This Example is intended to help you compare the cost of investing&#13;in the Fund with the cost of investing in other mutual funds. &amp;#160;The Example assumes that you invest $10,000 in the Fund for&#13;the time periods indicated and then redeem all of your shares at the end of those periods. &amp;#160;The Example also assumes that&#13;your investment has a 5% return each year and that the operating expenses remain the same. &amp;#160;Although your actual costs may&#13;be higher or lower, based on these assumptions your costs would be:&lt;/p&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleNarrativeTextBlock contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;This Example is intended to help you compare the cost of investing&#13;in the Fund with the cost of investing in other mutual funds. &amp;#160;The Example assumes that you invest $10,000 in the Fund for&#13;the time periods indicated and then redeem all of your shares at the end of those periods. &amp;#160;The Example also assumes that&#13;your investment has a 5% return each year and that the operating expenses remain the same. &amp;#160;Although your actual costs may&#13;be higher or lower, based on these assumptions your costs would be:&lt;/p&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleNarrativeTextBlock contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;This Example is intended to help you compare the cost of investing&#13;in the Fund with the cost of investing in other mutual funds. &amp;#160;The Example assumes that you invest $10,000 in the Fund for&#13;the time periods indicated and then redeem all of your shares at the end of those periods. &amp;#160;The Example also assumes that&#13;your investment has a 5% return each year and that the operating expenses remain the same. &amp;#160;Although your actual costs may&#13;be higher or lower, based on these assumptions your costs would be:&lt;/p&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleNarrativeTextBlock contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;This Example is intended to help you compare the cost of investing&#13;in the Fund with the cost of investing in other mutual funds. &amp;#160;The Example assumes that you invest $10,000 in the Fund for&#13;the time periods indicated and then redeem all of your shares at the end of those periods. &amp;#160;The Example also assumes that&#13;your investment has a 5% return each year and that the operating expenses remain the same. &amp;#160;Although your actual costs may&#13;be higher or lower, based on these assumptions your costs would be:&lt;/p&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleNarrativeTextBlock contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;This Example is intended to help you compare the cost of investing&#13;in the Fund with the cost of investing in other mutual funds. &amp;#160;The Example assumes that you invest $10,000 in the Fund for&#13;the time periods indicated and then redeem all of your shares at the end of those periods. &amp;#160;The Example also assumes that&#13;your investment has a 5% return each year and that the operating expenses remain the same. &amp;#160;Although your actual costs may&#13;be higher or lower, based on these assumptions your costs would be:&lt;/p&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleNarrativeTextBlock contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;This Example is intended to help you compare the cost of investing&#13;in the Fund with the cost of investing in other mutual funds. &amp;#160;The Example assumes that you invest $10,000 in the Fund for&#13;the time periods indicated and then redeem all of your shares at the end of those periods. &amp;#160;The Example also assumes that&#13;your investment has a 5% return each year and that the operating expenses remain the same. &amp;#160;Although your actual costs may&#13;be higher or lower, based on these assumptions your costs would be:&lt;/p&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleNarrativeTextBlock contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;This Example is intended to help you compare the cost of investing&#13;in the Fund with the cost of investing in other mutual funds. &amp;#160;The Example assumes that you invest $10,000 in the Fund for&#13;the time periods indicated and then redeem all of your shares at the end of those periods. &amp;#160;The Example also assumes that&#13;your investment has a 5% return each year and that the operating expenses remain the same. &amp;#160;Although your actual costs may&#13;be higher or lower, based on these assumptions your costs would be:&lt;/p&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleNarrativeTextBlock contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;This Example is intended to help you compare the cost of investing&#13;in the Fund with the cost of investing in other mutual funds. &amp;#160;The Example assumes that you invest $10,000 in the Fund for&#13;the time periods indicated and then redeem all of your shares at the end of those periods. &amp;#160;The Example also assumes that&#13;your investment has a 5% return each year and that the operating expenses remain the same. &amp;#160;Although your actual costs may&#13;be higher or lower, based on these assumptions your costs would be:&lt;/p&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleNarrativeTextBlock contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;This Example is intended to help you compare the cost of investing&#13;in the Fund with the cost of investing in other mutual funds. &amp;#160;The Example assumes that you invest $10,000 in the Fund for&#13;the time periods indicated and then redeem all of your shares at the end of those periods. &amp;#160;The Example also assumes that&#13;your investment has a 5% return each year and that the operating expenses remain the same. &amp;#160;Although your actual costs may&#13;be higher or lower, based on these assumptions your costs would be:&lt;/p&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleNarrativeTextBlock contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;This Example is intended to help you compare the cost of investing&#13;in the Fund with the cost of investing in other mutual funds. &amp;#160;The Example assumes that you invest $10,000 in the Fund for&#13;the time periods indicated and then redeem all of your shares at the end of those periods. &amp;#160;The Example also assumes that&#13;your investment has a 5% return each year and that the operating expenses remain the same. &amp;#160;Although your actual costs may&#13;be higher or lower, based on these assumptions your costs would be:&lt;/p&gt;</rr:ExpenseExampleNarrativeTextBlock>
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    <rr:PortfolioTurnoverHeading contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Portfolio Turnover&lt;/p&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverHeading contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Portfolio Turnover&lt;/p&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverHeading contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Portfolio Turnover&lt;/p&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverHeading contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Portfolio Turnover&lt;/p&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverHeading contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Portfolio Turnover&lt;/p&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverHeading contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Portfolio Turnover&lt;/p&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverHeading contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Portfolio Turnover&lt;/p&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverHeading contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Portfolio Turnover&lt;/p&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverHeading contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Portfolio Turnover&lt;/p&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverHeading contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Portfolio Turnover&lt;/p&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverHeading contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Portfolio Turnover&lt;/p&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The Fund pays transaction costs, such as commissions, when&#13;it buys and sells securities (or &amp;#147;turns over&amp;#148; the portfolio). &amp;#160;A higher portfolio turnover rate may indicate higher&#13;transaction costs and may result in higher taxes when Fund shares are held in a taxable account. &amp;#160;These costs, which are not&#13;reflected in Annual Fund Operating Expenses or in the Example, affect the Fund&amp;#146;s performance. During the most recent fiscal&#13;year, the Fund's portfolio turnover rate was 11 % of the average value of its portfolio.&lt;/p&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverTextBlock contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The Fund pays transaction costs, such as commissions, when&#13;it buys and sells securities (or &amp;#147;turns over&amp;#148; the portfolio). &amp;#160;A higher portfolio turnover rate may indicate higher&#13;transaction costs and may result in higher taxes when Fund shares are held in a taxable account. &amp;#160;These costs, which are not&#13;reflected in Annual Fund Operating Expenses or in the Example, affect the Fund&amp;#146;s performance. During the most recent fiscal&#13;year, the Fund's portfolio turnover rate was 10 % of the average value of its portfolio.&lt;/p&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverTextBlock contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The Fund pays transaction costs, such as commissions, when&#13;it buys and sells securities (or &amp;#147;turns over&amp;#148; the portfolio). &amp;#160;A higher portfolio turnover rate may indicate higher&#13;transaction costs and may result in higher taxes when Fund shares are held in a taxable account. &amp;#160;These costs, which are not&#13;reflected in Annual Fund Operating Expenses or in the Example, affect the Fund&amp;#146;s performance. During the most recent fiscal&#13;year, the Fund's portfolio turnover rate was 12% of the average value of its portfolio.&lt;/p&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverTextBlock contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The Fund pays transaction costs, such as commissions, when&#13;it buys and sells securities (or &amp;#147;turns over&amp;#148; the portfolio). &amp;#160;A higher portfolio turnover rate may indicate higher&#13;transaction costs and may result in higher taxes when Fund shares are held in a taxable account. &amp;#160;These costs, which are not&#13;reflected in Annual Fund Operating Expenses or in the Example, affect the Fund&amp;#146;s performance. During the most recent fiscal&#13;year, the Fund's portfolio turnover rate was 12 % of the average value of its portfolio.&lt;/p&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverTextBlock contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The Fund pays transaction costs, such as commissions, when&#13;it buys and sells securities (or &amp;#147;turns over&amp;#148; the portfolio). &amp;#160;A higher portfolio turnover rate may indicate higher&#13;transaction costs and may result in higher taxes when Fund shares are held in a taxable account. &amp;#160;These costs, which are not&#13;reflected in Annual Fund Operating Expenses or in the Example, affect the Fund&amp;#146;s performance. During the most recent fiscal&#13;year, the Fund's portfolio turnover rate was 12 % of the average value of its portfolio.&lt;/p&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverTextBlock contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The Fund pays transaction costs, such as commissions, when&#13;it buys and sells securities (or &amp;#147;turns over&amp;#148; the portfolio). &amp;#160;A higher portfolio turnover rate may indicate higher&#13;transaction costs and may result in higher taxes when Fund shares are held in a taxable account. &amp;#160;These costs, which are not&#13;reflected in Annual Fund Operating Expenses or in the Example, affect the Fund&amp;#146;s performance. During the most recent fiscal&#13;year, the Fund's portfolio turnover rate was 12 % of the average value of its portfolio.&lt;/p&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverTextBlock contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The Fund pays transaction costs, such as commissions, when&#13;it buys and sells securities (or &amp;#147;turns over&amp;#148; the portfolio). &amp;#160;A higher portfolio turnover rate may indicate higher&#13;transaction costs and may result in higher taxes when Fund shares are held in a taxable account. &amp;#160;These costs, which are not&#13;reflected in Annual Fund Operating Expenses or in the Example, affect the Fund&amp;#146;s performance. During the most recent fiscal&#13;year, the Fund's portfolio turnover rate was 8% of the average value of its portfolio.&lt;/p&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverTextBlock contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The Fund pays transaction costs, such as commissions, when&#13;it buys and sells securities (or &amp;#147;turns over&amp;#148; the portfolio). &amp;#160;A higher portfolio turnover rate may indicate higher&#13;transaction costs and may result in higher taxes when Fund shares are held in a taxable account. &amp;#160;These costs, which are not&#13;reflected in Annual Fund Operating Expenses or in the Example, affect the Fund&amp;#146;s performance. During the most recent fiscal&#13;year, the Fund's portfolio turnover rate was 17 % of the average value of its portfolio.&lt;/p&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverTextBlock contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The Fund pays transaction costs, such as commissions, when&#13;it buys and sells securities (or &amp;#147;turns over&amp;#148; the portfolio). &amp;#160;A higher portfolio turnover rate may indicate higher&#13;transaction costs and may result in higher taxes when Fund shares are held in a taxable account. &amp;#160;These costs, which are not&#13;reflected in Annual Fund Operating Expenses or in the Example, affect the Fund&amp;#146;s performance. During the most recent fiscal&#13;year, the Fund's portfolio turnover rate was 30 % of the average value of its portfolio.&lt;/p&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverTextBlock contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The Fund pays transaction costs, such as commissions, when&#13;it buys and sells securities (or &amp;#147;turns over&amp;#148; the portfolio). &amp;#160;A higher portfolio turnover rate may indicate higher&#13;transaction costs and may result in higher taxes when Fund shares are held in a taxable account. &amp;#160;These costs, which are not&#13;reflected in Annual Fund Operating Expenses or in the Example, affect the Fund&amp;#146;s performance. During the most recent fiscal&#13;year, the Fund's portfolio turnover rate was 9 % of the average value of its portfolio.&lt;/p&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverTextBlock contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The Fund pays transaction costs, such as commissions, when&#13;it buys and sells securities (or &amp;#147;turns over&amp;#148; the portfolio). &amp;#160;A higher portfolio turnover rate may indicate higher&#13;transaction costs and may result in higher taxes when Fund shares are held in a taxable account. &amp;#160;These costs, which are not&#13;reflected in Annual Fund Operating Expenses or in the Example, affect the Fund&amp;#146;s performance. During the most recent fiscal&#13;year, the Fund's portfolio turnover rate was 9 % of the average value of its portfolio.&lt;/p&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:StrategyHeading contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Investment Strategies&lt;/p&gt;</rr:StrategyHeading>
    <rr:StrategyHeading contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Investment Strategies&lt;/p&gt;</rr:StrategyHeading>
    <rr:StrategyHeading contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Investment Strategies&lt;/p&gt;</rr:StrategyHeading>
    <rr:StrategyHeading contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Investment Strategies&lt;/p&gt;</rr:StrategyHeading>
    <rr:StrategyHeading contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Investment Strategies&lt;/p&gt;</rr:StrategyHeading>
    <rr:StrategyHeading contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Investment Strategies&lt;/p&gt;</rr:StrategyHeading>
    <rr:StrategyHeading contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Investment Strategies&lt;/p&gt;</rr:StrategyHeading>
    <rr:StrategyHeading contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Investment Strategies&lt;/p&gt;</rr:StrategyHeading>
    <rr:StrategyHeading contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Investment Strategies&lt;/p&gt;</rr:StrategyHeading>
    <rr:StrategyHeading contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Investment Strategies&lt;/p&gt;</rr:StrategyHeading>
    <rr:StrategyHeading contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Investment Strategies&lt;/p&gt;</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;interest from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions , if securities are rated differently by the rating agencies&#13;, the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;In pursuing its investment objective, the Fund normally acquires&#13;municipal obligations with maturities of ten years or more. &amp;#160;The Fund&amp;#146;s portfolio often has a longer average maturity&#13;than is typical of most other funds that invest primarily in municipal obligations. &amp;#160;As a result, the interest rate risk described&#13;below may be more significant for the Fund. &amp;#160;The Fund may concentrate 25% or more of its total assets in certain types of&#13;municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one&#13;or more sectors (such as housing, hospitals, healthcare facilities or utilities).&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The investment adviser&amp;#146;s process for selecting obligations&#13;for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative&#13;value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating&#13;agencies and generally performs additional credit and investment analysis. &amp;#160;The portfolio manager also may trade securities&#13;to seek to minimize taxable capital gains to shareholders. &amp;#160;A portion of the Fund&amp;#146;s distributions generally will be&#13;subject to the federal alternative minimum tax. &amp;#160;&lt;i&gt;The Fund may not be suitable for investors subject to the federal alternative&#13;minimum tax.&lt;/i&gt;&lt;/p&gt;</rr:StrategyNarrativeTextBlock>
    <rr:StrategyNarrativeTextBlock contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions, if securities are rated differently by the rating agencies,&#13;the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;In pursuing its investment objective, the Fund normally acquires&#13;municipal obligations with maturities of ten years or more. &amp;#160;The Fund&amp;#146;s portfolio often has a longer average maturity&#13;than is typical of most other funds that invest primarily in municipal obligations. &amp;#160;As a result, the interest rate risk described&#13;below may be more significant for the Fund. &amp;#160;The Fund may concentrate 25% or more of its total assets in certain types of&#13;municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one&#13;or more sectors (such as housing, hospitals, healthcare facilities or utilities).&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The investment adviser&amp;#146;s process for selecting obligations&#13;for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative&#13;value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating&#13;agencies and generally performs additional credit and investment analysis. &amp;#160;The portfolio manager also may trade securities&#13;to seek to minimize taxable capital gains to shareholders. &amp;#160;A portion of the Fund&amp;#146;s distributions generally will be&#13;subject to the federal alternative minimum tax. &amp;#160;&lt;i&gt;The Fund may not be suitable for investors subject to the federal alternative&#13;minimum tax.&lt;/i&gt;&lt;/p&gt;</rr:StrategyNarrativeTextBlock>
    <rr:StrategyNarrativeTextBlock contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions, if securities are rated differently by the rating agencies,&#13;the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;In pursuing its investment objective, the Fund normally acquires&#13;municipal obligations with maturities of ten years or more. &amp;#160;The Fund&amp;#146;s portfolio often has a longer average maturity&#13;than is typical of most other funds that invest primarily in municipal obligations. &amp;#160;As a result, the interest rate risk described&#13;below may be more significant for the Fund. &amp;#160;The Fund may concentrate 25% or more of its total assets in certain types of&#13;municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one&#13;or more sectors (such as housing, hospitals, healthcare facilities or utilities).&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The investment adviser&amp;#146;s process for selecting obligations&#13;for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative&#13;value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating&#13;agencies and generally performs additional credit and investment analysis. &amp;#160;The portfolio manager also may trade securities&#13;to seek to minimize taxable capital gains to shareholders. &amp;#160;A portion of the Fund&amp;#146;s distributions generally will be&#13;subject to the federal alternative minimum tax. &amp;#160;&lt;i&gt;The Fund may not be suitable for investors subject to the federal alternative&#13;minimum tax.&lt;/i&gt;&lt;/p&gt;</rr:StrategyNarrativeTextBlock>
    <rr:StrategyNarrativeTextBlock contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions, if securities are rated differently by the rating agencies,&#13;the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;In pursuing its investment objective, the Fund normally acquires&#13;municipal obligations with maturities of ten years or more. &amp;#160;The Fund&amp;#146;s portfolio often has a longer average maturity&#13;than is typical of most other funds that invest primarily in municipal obligations. &amp;#160;As a result, the interest rate risk described&#13;below may be more significant for the Fund. &amp;#160;The Fund may concentrate 25% or more of its total assets in certain types of&#13;municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one&#13;or more sectors (such as housing, hospitals, healthcare facilities or utilities).&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The investment adviser&amp;#146;s process for selecting obligations&#13;for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative&#13;value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating&#13;agencies and generally performs additional credit and investment analysis. &amp;#160;The portfolio manager also may trade securities&#13;to seek to minimize taxable capital gains to shareholders. &amp;#160;A portion of the Fund&amp;#146;s distributions generally will be&#13;subject to the federal alternative minimum tax. &amp;#160;&lt;i&gt;The Fund may not be suitable for investors subject to the federal alternative&#13;minimum tax.&lt;/i&gt;&lt;/p&gt;</rr:StrategyNarrativeTextBlock>
    <rr:StrategyNarrativeTextBlock contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions, if securities are rated differently by the rating agencies,&#13;the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;In pursuing its investment objective, the Fund normally acquires&#13;municipal obligations with maturities of ten years or more. &amp;#160;The Fund&amp;#146;s portfolio often has a longer average maturity&#13;than is typical of most other funds that invest primarily in municipal obligations. &amp;#160;As a result, the interest rate risk described&#13;below may be more significant for the Fund. &amp;#160;The Fund may concentrate 25% or more of its total assets in certain types of&#13;municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one&#13;or more sectors (such as housing, hospitals, healthcare facilities or utilities).&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The investment adviser&amp;#146;s process for selecting obligations&#13;for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative&#13;value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating&#13;agencies and generally performs additional credit and investment analysis. &amp;#160;The portfolio manager also may trade securities&#13;to seek to minimize taxable capital gains to shareholders. &amp;#160;A portion of the Fund&amp;#146;s distributions generally will be&#13;subject to the federal alternative minimum tax. &amp;#160;&lt;i&gt;The Fund may not be suitable for investors subject to the federal alternative&#13;minimum tax.&lt;/i&gt;&lt;/p&gt;</rr:StrategyNarrativeTextBlock>
    <rr:StrategyNarrativeTextBlock contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions, if securities are rated differently by the rating agencies,&#13;the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;In pursuing its investment objective, the Fund normally acquires&#13;municipal obligations with maturities of ten years or more. &amp;#160;The Fund&amp;#146;s portfolio often has a longer average maturity&#13;than is typical of most other funds that invest primarily in municipal obligations. &amp;#160;As a result, the interest rate risk described&#13;below may be more significant for the Fund. &amp;#160;The Fund may concentrate 25% or more of its total assets in certain types of&#13;municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one&#13;or more sectors (such as housing, hospitals, healthcare facilities or utilities).&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0 5.6pt"&gt;The investment adviser&amp;#146;s process for selecting obligations&#13;for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative&#13;value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating&#13;agencies and generally performs additional credit and investment analysis. &amp;#160;The portfolio manager also may trade securities&#13;to seek to minimize taxable capital gains to shareholders. &amp;#160;A portion of the Fund&amp;#146;s distributions generally will be&#13;subject to the federal alternative minimum tax. &amp;#160;&lt;i&gt;The Fund may not be suitable for investors subject to the federal alternative&#13;minimum tax.&lt;/i&gt;&lt;/p&gt;</rr:StrategyNarrativeTextBlock>
    <rr:StrategyNarrativeTextBlock contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions, if securities are rated differently by the rating agencies,&#13;the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;In pursuing its investment objective, the Fund normally acquires&#13;municipal obligations with maturities of ten years or more. &amp;#160;The Fund&amp;#146;s portfolio often has a longer average maturity&#13;than is typical of most other funds that invest primarily in municipal obligations. &amp;#160;As a result, the interest rate risk described&#13;below may be more significant for the Fund. &amp;#160;The Fund may concentrate 25% or more of its total assets in certain types of&#13;municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one&#13;or more sectors (such as housing, hospitals, healthcare facilities or utilities).&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The investment adviser&amp;#146;s process for selecting obligations&#13;for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative&#13;value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating&#13;agencies and generally performs additional credit and investment analysis. &amp;#160;The portfolio manager also may trade securities&#13;to seek to minimize taxable capital gains to shareholders. &amp;#160;A portion of the Fund&amp;#146;s distributions generally will be&#13;subject to the federal alternative minimum tax. &amp;#160;&lt;i&gt;The Fund may not be suitable for investors subject to the federal alternative&#13;minimum tax.&lt;/i&gt;&lt;/p&gt;</rr:StrategyNarrativeTextBlock>
    <rr:StrategyNarrativeTextBlock contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions , if securities are rated differently by the rating agencies&#13;, the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;In pursuing its investment objective, the Fund normally acquires&#13;municipal obligations with maturities of ten years or more. &amp;#160;The Fund&amp;#146;s portfolio often has a longer average maturity&#13;than is typical of most other funds that invest primarily in municipal obligations. &amp;#160;As a result, the interest rate risk described&#13;below may be more significant for the Fund. &amp;#160;The Fund may concentrate 25% or more of its total assets in certain types of&#13;municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one&#13;or more sectors (such as housing, hospitals, healthcare facilities or utilities).&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The investment adviser&amp;#146;s process for selecting obligations&#13;for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative&#13;value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating&#13;agencies and generally performs additional credit and investment analysis. &amp;#160;The portfolio manager also may trade securities&#13;to seek to minimize taxable capital gains to shareholders. &amp;#160;A portion of the Fund&amp;#146;s distributions generally will be&#13;subject to the federal alternative minimum tax. &amp;#160;&lt;i&gt;The Fund may not be suitable for investors subject to the federal alternative&#13;minimum tax.&lt;/i&gt;&lt;/p&gt;</rr:StrategyNarrativeTextBlock>
    <rr:StrategyNarrativeTextBlock contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions, if securities are rated differently by the rating agencies,&#13;the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;In pursuing its investment objective, the Fund normally acquires&#13;municipal obligations with maturities of ten years or more. &amp;#160;The Fund&amp;#146;s portfolio often has a longer average maturity&#13;than is typical of most other funds that invest primarily in municipal obligations. &amp;#160;As a result, the interest rate risk described&#13;below may be more significant for the Fund. &amp;#160;The Fund may concentrate 25% or more of its total assets in certain types of&#13;municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one&#13;or more sectors (such as housing, hospitals, healthcare facilities or utilities).&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The investment adviser&amp;#146;s process for selecting obligations&#13;for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative&#13;value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating&#13;agencies and generally performs additional credit and investment analysis. &amp;#160;The portfolio manager also may trade securities&#13;to seek to minimize taxable capital gains to shareholders. &amp;#160;A portion of the Fund&amp;#146;s distributions generally will be&#13;subject to the federal alternative minimum tax. &amp;#160;&lt;i&gt;The Fund may not be suitable for investors subject to the federal alternative&#13;minimum tax.&lt;/i&gt;&lt;/p&gt;</rr:StrategyNarrativeTextBlock>
    <rr:StrategyNarrativeTextBlock contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions , if securities are rated differently by the rating agencies&#13;, the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;In pursuing its investment objective, the Fund normally acquires&#13;municipal obligations with maturities of ten years or more. &amp;#160;The Fund&amp;#146;s portfolio often has a longer average maturity&#13;than is typical of most other funds that invest primarily in municipal obligations. &amp;#160;As a result, the interest rate risk described&#13;below may be more significant for the Fund. &amp;#160;The Fund may concentrate 25% or more of its total assets in certain types of&#13;municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one&#13;or more sectors (such as housing, hospitals, healthcare facilities or utilities).&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The investment adviser&amp;#146;s process for selecting obligations&#13;for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative&#13;value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating&#13;agencies and generally performs additional credit and investment analysis. &amp;#160;The portfolio manager also may trade securities&#13;to seek to minimize taxable capital gains to shareholders. &amp;#160;A portion of the Fund&amp;#146;s distributions generally will be&#13;subject to the federal alternative minimum tax. &amp;#160;&lt;i&gt;The Fund may not be suitable for investors subject to the federal alternative&#13;minimum tax.&lt;/i&gt;&lt;/p&gt;</rr:StrategyNarrativeTextBlock>
    <rr:StrategyNarrativeTextBlock contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The balance of net assets may be invested in municipal obligations&#13;rated below investment grade and in unrated municipal obligations considered to be of comparable quality by the investment adviser&#13;(&amp;#147;junk bonds&amp;#148;). The Fund will not invest more than 10% of its net assets in obligations rated below B or in unrated&#13;obligations considered to be of comparable quality by the investment adviser. &amp;#160;For purposes of rating restrictions, if securities&#13;are rated differently by the rating agencies, the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests&#13;at least 65% of its total assets in obligations issued by its state or its political subdivisions, agencies, authorities and instrumentalities.&#13;&amp;#160;If consistent with relevant state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations&#13;issued by the governments of Puerto Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and&#13;may invest, with respect to 50% of its total assets, more than 5% (but not more than 25%) of its total assets in securities of&#13;any one issuer (such limitations do not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments&#13;(such as residual interest bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging&#13;purposes, to seek total return or as a substitute for the purchase or sale of securities.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;In pursuing its investment objective, the Fund normally acquires&#13;municipal obligations with maturities of ten years or more. &amp;#160;The Fund&amp;#146;s portfolio often has a longer average maturity&#13;than is typical of most other funds that invest primarily in municipal obligations. &amp;#160;As a result, the interest rate risk described&#13;below may be more significant for the Fund. &amp;#160;The Fund may concentrate 25% or more of its total assets in certain types of&#13;municipal obligations (such as general obligations, municipal leases, revenue bonds and industrial development bonds) and in one&#13;or more sectors (such as housing, hospitals, healthcare facilities or utilities).&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The investment adviser&amp;#146;s process for selecting obligations&#13;for purchase and sale emphasizes the creditworthiness of the issuer or other person obligated to repay the obligation and the relative&#13;value of the obligation in the market. In evaluating creditworthiness, the investment adviser considers ratings assigned by rating&#13;agencies and generally performs additional credit and investment analysis. &amp;#160;The portfolio manager also may trade securities&#13;to seek to minimize taxable capital gains to shareholders. &amp;#160;A portion of the Fund&amp;#146;s distributions generally will be&#13;subject to the federal alternative minimum tax. &amp;#160;&lt;i&gt;The Fund may not be suitable for investors subject to the federal alternative&#13;minimum tax.&lt;/i&gt;&lt;/p&gt;</rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Risks&lt;/p&gt;</rr:RiskHeading>
    <rr:RiskHeading contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Risks&lt;/p&gt;</rr:RiskHeading>
    <rr:RiskHeading contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Risks&lt;/p&gt;</rr:RiskHeading>
    <rr:RiskHeading contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Risks&lt;/p&gt;</rr:RiskHeading>
    <rr:RiskHeading contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Risks&lt;/p&gt;</rr:RiskHeading>
    <rr:RiskHeading contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Risks&lt;/p&gt;</rr:RiskHeading>
    <rr:RiskHeading contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Risks&lt;/p&gt;</rr:RiskHeading>
    <rr:RiskHeading contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Risks&lt;/p&gt;</rr:RiskHeading>
    <rr:RiskHeading contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Risks&lt;/p&gt;</rr:RiskHeading>
    <rr:RiskHeading contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Risks&lt;/p&gt;</rr:RiskHeading>
    <rr:RiskHeading contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Principal Risks&lt;/p&gt;</rr:RiskHeading>
    <rr:RiskNarrativeTextBlock contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Municipal Bond Risk.&lt;i&gt; &lt;/i&gt;&amp;#160;The amount of public information&#13;available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance&#13;of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate&#13;bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other&#13;securities markets, which may limit an owner&amp;#146;s ability to sell its bonds at attractive prices. &amp;#160;The spread between the&#13;price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.&#13;&amp;#160;Less liquid obligations can become more difficult to value and be subject to erratic price movements. &amp;#160;The increased&#13;presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater&#13;volatility in the markets.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Debt Market Risk. &amp;#160;Economic and other events (whether&#13;real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value&#13;of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted. &amp;#160;Certain securities and other investments&#13;held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market&#13;may exceed the demand. &amp;#160;At other times, the demand for such instruments may exceed the supply in the market. &amp;#160;An imbalance&#13;in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading&#13;spreads and a lack of price transparency in the market. &amp;#160;No active trading market may exist for certain investments, which&#13;may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate&#13;such assets. Adverse market conditions may impair the liquidity of some actively traded investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Interest Rate Risk. &lt;font style="font-family: NewsGoth BT, Sans-Serif"&gt;&amp;#160;&lt;/font&gt;As&#13;interest rates rise, the value of Fund shares is likely to decline. &amp;#160;Conversely, when interest rates decline, the value of&#13;Fund shares is likely to rise. &amp;#160;Obligations with longer maturities generally offer higher yields, but involve greater risk&#13;because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.&#13;&amp;#160;In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay&#13;or &amp;#147;call&amp;#148; the obligation. &amp;#160;In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower&#13;yields. &amp;#160;Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby&#13;be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Credit Risk. &amp;#160;Changes in economic conditions or other&#13;circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead&#13;to defaults. Such defaults may reduce the value of Fund shares and income distributions. &amp;#160;The value of a fixed income security&#13;also may decline because of real or perceived concerns about the issuer&amp;#146;s ability to make principal and interest payments.&#13;&amp;#160;In addition, the credit rating of securities held by the Fund may be lowered if an issuer&amp;#146;s financial condition changes.&#13;&amp;#160;Municipal obligations may be insured as to principal and interest payments. &amp;#160;If the claims-paying ability or other rating&#13;of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected. &amp;#160;In the case of&#13;an insured bond, the bond&amp;#146;s rating will be deemed to be the higher of the rating assigned to the bond&amp;#146;s issuer or the&#13;insurer.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Lower Rated Investments.&lt;i&gt; &lt;/i&gt;&amp;#160;Investments&#13;rated below investment grade and comparable unrated securities (&amp;#147; junk bonds &amp;#148;) have speculative characteristics because&#13;of the credit risk associated with their issuers. &amp;#160;Changes in economic conditions or other circumstances typically have a&#13;greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers&#13;of higher rated investments. &amp;#160;An economic downturn generally leads to a higher non-payment rate, and a lower rated investment&#13;may lose significant value before a default occurs. &amp;#160;Lower rated investments typically are subject to greater price volatility&#13;and illiquidity than higher rated investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Derivatives Risk. &lt;i&gt;&amp;#160;&lt;/i&gt;The use of derivatives can&#13;lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative,&#13;due to failure of a counterparty or due to tax or regulatory constraints. &amp;#160;Derivatives may create economic leverage in the&#13;Fund, which magnifies the Fund&amp;#146;s exposure to the underlying investment. Derivatives risk may be more significant when derivatives&#13;are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position&#13;held by the Fund. &amp;#160;When derivatives are used to gain or limit exposure to a particular market or market segment, their performance&#13;may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose&#13;for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill&#13;and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events. &amp;#160;Derivative&#13;instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the&#13;value of the underlying instrument. &amp;#160;If a derivative&amp;#146;s counterparty is unable to honor its commitments, the value of&#13;Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.&#13;&amp;#160;The loss on derivative transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Leveraged Transactions. &amp;#160;Certain Fund transactions&#13;may give rise to a form of leverage. &amp;#160;Such transactions may include, among others, the use of when-issued, delayed delivery&#13;or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions. &amp;#160;The Fund is&#13;required to segregate liquid assets or otherwise cover the Fund&amp;#146;s obligation created by a transaction that may give rise&#13;to leverage. &amp;#160;The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do&#13;so to satisfy its obligations or to meet segregation requirements. &amp;#160;Leverage may cause the Fund to be more volatile than if&#13;it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the&#13;Fund&amp;#146;s portfolio securities. &amp;#160;The loss on leveraged transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Residual Interest Bonds. &lt;i&gt;&amp;#160;&lt;/i&gt;The Fund may&#13;enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate&#13;municipal bond. &amp;#160;The interest payments that the Fund receives on the residual interest bonds acquired in such transactions&#13;vary inversely with short-term interest rates, normally decreasing when short-term rates increase. &amp;#160;The value and market for&#13;residual interest bonds are volatile and such bonds may have limited liquidity. &amp;#160;As required by applicable accounting standards,&#13;the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income&#13;in an amount equal to this expense.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Sector and Geographic Concentration Risk. &amp;#160;Because the&#13;Fund will concentrate its investments in obligations issued in a particular state and may concentrate in certain sectors or types&#13;of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation&#13;and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for&#13;state-specific economic information.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks of Principal Only Investments. &amp;#160;Principal only&#13;investments entitle the holder to receive par value of such investment if held to maturity. &amp;#160;The values of principal only&#13;investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.&#13;&amp;#160;The Fund will accrue income on these investments and is required to distribute that income each year. &amp;#160;The Fund may&#13;be required to sell securities to obtain cash needed for such income distributions.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Tax Risk. &amp;#160;Income from tax-exempt municipal obligations&#13;could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service,&#13;or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund&amp;#146;s income may be taxable to shareholders&#13;subject to the federal alternative minimum tax.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks Associated with Active Management. &amp;#160;The Fund is&#13;an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser&#13;to develop and effectively implement strategies to achieve the Fund&amp;#146;s investment objective. &amp;#160;Subjective decisions made&#13;by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;General Fund Investing Risks. &amp;#160;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &amp;#160;All investments carry a certain amount of risk and there&#13;is no guarantee that the Fund will be able to achieve its investment objective. &amp;#160;Annual Fund Operating Expenses expressed&#13;as a percentage of the Fund&amp;#146;s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating&#13;Expenses may differ in the future. &amp;#160;Purchase and redemption activities by Fund shareholders may impact the management of the&#13;Fund and its ability to achieve its investment objective. &amp;#160; In addition, the redemption by one or more large shareholders&#13;or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund.&#13;&amp;#160; Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines&#13;in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance&#13;Corporation or any other government agency, entity or person. &amp;#160;Mutual funds, investment advisers, other market participants&#13;and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators.&amp;#160; Changes&#13;to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the&#13;Fund&amp;#146;s ability to execute its investment strategy.&lt;/p&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskNarrativeTextBlock contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Municipal Bond Risk.&lt;i&gt; &lt;/i&gt;&amp;#160;The amount of public information&#13;available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance&#13;of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate&#13;bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other&#13;securities markets, which may limit an owner&amp;#146;s ability to sell its bonds at attractive prices. &amp;#160;The spread between the&#13;price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.&#13;&amp;#160;Less liquid obligations can become more difficult to value and be subject to erratic price movements. &amp;#160;The increased&#13;presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater&#13;volatility in the markets.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Debt Market Risk. &amp;#160;Economic and other events (whether&#13;real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value&#13;of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted. &amp;#160;Certain securities and other investments&#13;held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market&#13;may exceed the demand. &amp;#160;At other times, the demand for such instruments may exceed the supply in the market. &amp;#160;An imbalance&#13;in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading&#13;spreads and a lack of price transparency in the market. &amp;#160;No active trading market may exist for certain investments, which&#13;may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate&#13;such assets. Adverse market conditions may impair the liquidity of some actively traded investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Interest Rate Risk. &lt;font style="font-family: NewsGoth BT, Sans-Serif"&gt;&amp;#160;&lt;/font&gt;As&#13;interest rates rise, the value of Fund shares is likely to decline. &amp;#160;Conversely, when interest rates decline, the value of&#13;Fund shares is likely to rise. &amp;#160;Obligations with longer maturities generally offer higher yields, but involve greater risk&#13;because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.&#13;&amp;#160;In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay&#13;or &amp;#147;call&amp;#148; the obligation. &amp;#160;In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower&#13;yields. &amp;#160;Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby&#13;be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Credit Risk. &amp;#160;Changes in economic conditions or other&#13;circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead&#13;to defaults. Such defaults may reduce the value of Fund shares and income distributions. &amp;#160;The value of a fixed income security&#13;also may decline because of real or perceived concerns about the issuer&amp;#146;s ability to make principal and interest payments.&#13;&amp;#160;In addition, the credit rating of securities held by the Fund may be lowered if an issuer&amp;#146;s financial condition changes.&#13;&amp;#160;Municipal obligations may be insured as to principal and interest payments. &amp;#160;If the claims-paying ability or other rating&#13;of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected. &amp;#160;In the case of&#13;an insured bond, the bond&amp;#146;s rating will be deemed to be the higher of the rating assigned to the bond&amp;#146;s issuer or the&#13;insurer.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Lower Rated Investments.&lt;i&gt; &lt;/i&gt;&amp;#160;Investments&#13;rated below investment grade and comparable unrated securities (&amp;#147; junk bonds &amp;#148;) have speculative characteristics because&#13;of the credit risk associated with their issuers. &amp;#160;Changes in economic conditions or other circumstances typically have a&#13;greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers&#13;of higher rated investments. &amp;#160;An economic downturn generally leads to a higher non-payment rate, and a lower rated investment&#13;may lose significant value before a default occurs. &amp;#160;Lower rated investments typically are subject to greater price volatility&#13;and illiquidity than higher rated investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Derivatives Risk. &lt;i&gt;&amp;#160;&lt;/i&gt;The use of derivatives can&#13;lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative,&#13;due to failure of a counterparty or due to tax or regulatory constraints. &amp;#160;Derivatives may create economic leverage in the&#13;Fund, which magnifies the Fund&amp;#146;s exposure to the underlying investment. Derivatives risk may be more significant when derivatives&#13;are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position&#13;held by the Fund. &amp;#160;When derivatives are used to gain or limit exposure to a particular market or market segment, their performance&#13;may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose&#13;for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill&#13;and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events. &amp;#160;Derivative&#13;instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the&#13;value of the underlying instrument. &amp;#160;If a derivative&amp;#146;s counterparty is unable to honor its commitments, the value of&#13;Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.&#13;&amp;#160;The loss on derivative transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Leveraged Transactions. &amp;#160;Certain Fund transactions&#13;may give rise to a form of leverage. &amp;#160;Such transactions may include, among others, the use of when-issued, delayed delivery&#13;or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions. &amp;#160;The Fund is&#13;required to segregate liquid assets or otherwise cover the Fund&amp;#146;s obligation created by a transaction that may give rise&#13;to leverage. &amp;#160;The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do&#13;so to satisfy its obligations or to meet segregation requirements. &amp;#160;Leverage may cause the Fund to be more volatile than if&#13;it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the&#13;Fund&amp;#146;s portfolio securities. &amp;#160;The loss on leveraged transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Residual Interest Bonds. &lt;i&gt;&amp;#160;&lt;/i&gt;The Fund may&#13;enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate&#13;municipal bond. &amp;#160;The interest payments that the Fund receives on the residual interest bonds acquired in such transactions&#13;vary inversely with short-term interest rates, normally decreasing when short-term rates increase. &amp;#160;The value and market for&#13;residual interest bonds are volatile and such bonds may have limited liquidity. &amp;#160;As required by applicable accounting standards,&#13;the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income&#13;in an amount equal to this expense.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Sector and Geographic Concentration Risk. &amp;#160;Because the&#13;Fund will concentrate its investments in obligations issued in a particular state and may concentrate in certain sectors or types&#13;of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation&#13;and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for&#13;state-specific economic information.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks of Principal Only Investments. &amp;#160;Principal only&#13;investments entitle the holder to receive par value of such investment if held to maturity. &amp;#160;The values of principal only&#13;investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.&#13;&amp;#160;The Fund will accrue income on these investments and is required to distribute that income each year. &amp;#160;The Fund may&#13;be required to sell securities to obtain cash needed for such income distributions.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Tax Risk. &amp;#160;Income from tax-exempt municipal obligations&#13;could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service,&#13;or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund&amp;#146;s income may be taxable to shareholders&#13;subject to the federal alternative minimum tax.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks Associated with Active Management. &amp;#160;The Fund is&#13;an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser&#13;to develop and effectively implement strategies to achieve the Fund&amp;#146;s investment objective. &amp;#160;Subjective decisions made&#13;by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;General Fund Investing Risks. &amp;#160;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &amp;#160;All investments carry a certain amount of risk and there&#13;is no guarantee that the Fund will be able to achieve its investment objective. &amp;#160;Annual Fund Operating Expenses expressed&#13;as a percentage of the Fund&amp;#146;s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating&#13;Expenses may differ in the future. &amp;#160;Purchase and redemption activities by Fund shareholders may impact the management of the&#13;Fund and its ability to achieve its investment objective. &amp;#160;In addition, the redemption by one or more large shareholders or&#13;groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund. &amp;#160;Investors&#13;in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment&#13;in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other&#13;government agency, entity or person. &amp;#160;Mutual funds, investment advisers, other market participants and many securities markets&#13;are subject to rules and regulations and the jurisdiction of one or more regulators.&amp;#160; Changes to applicable rules and regulations&#13;could have an adverse affect on securities markets and market participants, as well as on the Fund&amp;#146;s ability to execute its&#13;investment strategy.&lt;/p&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskNarrativeTextBlock contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Municipal Bond Risk.&lt;i&gt; &lt;/i&gt;&amp;#160;The amount of public information&#13;available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance&#13;of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate&#13;bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other&#13;securities markets, which may limit an owner&amp;#146;s ability to sell its bonds at attractive prices. &amp;#160;The spread between the&#13;price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.&#13;&amp;#160;Less liquid obligations can become more difficult to value and be subject to erratic price movements. &amp;#160;The increased&#13;presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater&#13;volatility in the markets.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Debt Market Risk. &amp;#160;Economic and other events (whether&#13;real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value&#13;of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted. &amp;#160;Certain securities and other investments&#13;held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market&#13;may exceed the demand. &amp;#160;At other times, the demand for such instruments may exceed the supply in the market. &amp;#160;An imbalance&#13;in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading&#13;spreads and a lack of price transparency in the market. &amp;#160;No active trading market may exist for certain investments, which&#13;may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate&#13;such assets. Adverse market conditions may impair the liquidity of some actively traded investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Interest Rate Risk. &lt;font style="font-family: NewsGoth BT, Sans-Serif"&gt;&amp;#160;&lt;/font&gt;As&#13;interest rates rise, the value of Fund shares is likely to decline. &amp;#160;Conversely, when interest rates decline, the value of&#13;Fund shares is likely to rise. &amp;#160;Obligations with longer maturities generally offer higher yields, but involve greater risk&#13;because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.&#13;&amp;#160;In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay&#13;or &amp;#147;call&amp;#148; the obligation. &amp;#160;In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower&#13;yields. &amp;#160;Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby&#13;be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Credit Risk. &amp;#160;Changes in economic conditions or other&#13;circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead&#13;to defaults. Such defaults may reduce the value of Fund shares and income distributions. &amp;#160;The value of a fixed income security&#13;also may decline because of real or perceived concerns about the issuer&amp;#146;s ability to make principal and interest payments.&#13;&amp;#160;In addition, the credit rating of securities held by the Fund may be lowered if an issuer&amp;#146;s financial condition changes.&#13;&amp;#160;Municipal obligations may be insured as to principal and interest payments. &amp;#160;If the claims-paying ability or other rating&#13;of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected. &amp;#160;In the case of&#13;an insured bond, the bond&amp;#146;s rating will be deemed to be the higher of the rating assigned to the bond&amp;#146;s issuer or the&#13;insurer.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Lower Rated Investments.&lt;i&gt; &lt;/i&gt;&amp;#160;Investments&#13;rated below investment grade and comparable unrated securities (&amp;#147;junk bonds&amp;#148;) have speculative characteristics because&#13;of the credit risk associated with their issuers. &amp;#160;Changes in economic conditions or other circumstances typically have a&#13;greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers&#13;of higher rated investments. &amp;#160;An economic downturn generally leads to a higher non-payment rate, and a lower rated investment&#13;may lose significant value before a default occurs. &amp;#160;Lower rated investments typically are subject to greater price volatility&#13;and illiquidity than higher rated investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Derivatives Risk. &lt;i&gt;&amp;#160;&lt;/i&gt;The use of derivatives can&#13;lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative,&#13;due to failure of a counterparty or due to tax or regulatory constraints. &amp;#160;Derivatives may create economic leverage in the&#13;Fund, which magnifies the Fund&amp;#146;s exposure to the underlying investment. Derivatives risk may be more significant when derivatives&#13;are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position&#13;held by the Fund. &amp;#160;When derivatives are used to gain or limit exposure to a particular market or market segment, their performance&#13;may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose&#13;for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill&#13;and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events. &amp;#160;Derivative&#13;instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the&#13;value of the underlying instrument. &amp;#160;If a derivative&amp;#146;s counterparty is unable to honor its commitments, the value of&#13;Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.&#13;&amp;#160;The loss on derivative transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Leveraged Transactions. &amp;#160;Certain Fund transactions&#13;may give rise to a form of leverage. &amp;#160;Such transactions may include, among others, the use of when-issued, delayed delivery&#13;or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions. &amp;#160;The Fund is&#13;required to segregate liquid assets or otherwise cover the Fund&amp;#146;s obligation created by a transaction that may give rise&#13;to leverage. &amp;#160;The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do&#13;so to satisfy its obligations or to meet segregation requirements. &amp;#160;Leverage may cause the Fund to be more volatile than if&#13;it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the&#13;Fund&amp;#146;s portfolio securities. &amp;#160;The loss on leveraged transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Residual Interest Bonds. &lt;i&gt;&amp;#160;&lt;/i&gt;The Fund may&#13;enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate&#13;municipal bond. &amp;#160;The interest payments that the Fund receives on the residual interest bonds acquired in such transactions&#13;vary inversely with short-term interest rates, normally decreasing when short-term rates increase. &amp;#160;The value and market for&#13;residual interest bonds are volatile and such bonds may have limited liquidity. &amp;#160;As required by applicable accounting standards,&#13;the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income&#13;in an amount equal to this expense.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Sector and Geographic Concentration Risk. &amp;#160;Because the&#13;Fund will concentrate its investments in obligations issued in a particular state and may concentrate in certain sectors or types&#13;of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation&#13;and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for&#13;state-specific economic information.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks of Principal Only Investments. &amp;#160;Principal only&#13;investments entitle the holder to receive par value of such investment if held to maturity. &amp;#160;The values of principal only&#13;investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.&#13;&amp;#160;The Fund will accrue income on these investments and is required to distribute that income each year. &amp;#160;The Fund may&#13;be required to sell securities to obtain cash needed for such income distributions.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Tax Risk. &amp;#160;Income from tax-exempt municipal obligations&#13;could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service,&#13;or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund&amp;#146;s income may be taxable to shareholders&#13;subject to the federal alternative minimum tax.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks Associated with Active Management. &amp;#160;The Fund is&#13;an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser&#13;to develop and effectively implement strategies to achieve the Fund&amp;#146;s investment objective. &amp;#160;Subjective decisions made&#13;by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.&lt;/p&gt;&#13;&#13;&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;&lt;font style="font-size: 10pt"&gt;General Fund Investing Risks.&#13;&amp;#160;The Fund is not a complete investment program and you may lose money by investing in the Fund. &amp;#160;All investments carry&#13;a certain amount of risk and there is no guarantee that the Fund will be able to achieve its investment objective. &amp;#160;Annual&#13;Fund Operating Expenses expressed as a percentage of the Fund&amp;#146;s average daily net assets may change as Fund assets increase&#13;and decrease, and Annual Fund Operating Expenses may differ in the future. &amp;#160;Purchase and redemption activities by Fund shareholders&#13;may impact the management of the Fund and its ability to achieve its investment objective. &amp;#160; In addition, the redemption by&#13;one or more large shareholders or groups of shareholders of their holdings in the Fund could have an &lt;/font&gt;&lt;font style="font-size: 9pt"&gt;adverse&#13;&lt;/font&gt;&lt;font style="font-size: 10pt"&gt;impact on the remaining shareholders in the Fund . &amp;#160;Investors in the Fund should have&#13;a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment in the Fund is not&#13;a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency,&#13;entity or person. &amp;#160;Mutual funds, investment advisers, other market participants and many securities markets are subject to&#13;rules and regulations and the jurisdiction of one or more regulators.&amp;#160; Changes to applicable rules and regulations could have&#13;an adverse affect on securities markets and market participants, as well as on the Fund&amp;#146;s ability to execute its investment&#13;strategy. &lt;/font&gt;&lt;/p&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskNarrativeTextBlock contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Municipal Bond Risk.&lt;i&gt; &lt;/i&gt;&amp;#160;The amount of public information&#13;available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance&#13;of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate&#13;bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other&#13;securities markets, which may limit an owner&amp;#146;s ability to sell its bonds at attractive prices. &amp;#160;The spread between the&#13;price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.&#13;&amp;#160;Less liquid obligations can become more difficult to value and be subject to erratic price movements. &amp;#160;The increased&#13;presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater&#13;volatility in the markets.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Debt Market Risk. &amp;#160;Economic and other events (whether&#13;real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value&#13;of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted. &amp;#160;Certain securities and other investments&#13;held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market&#13;may exceed the demand. &amp;#160;At other times, the demand for such instruments may exceed the supply in the market. &amp;#160;An imbalance&#13;in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading&#13;spreads and a lack of price transparency in the market. &amp;#160;No active trading market may exist for certain investments, which&#13;may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate&#13;such assets. Adverse market conditions may impair the liquidity of some actively traded investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Interest Rate Risk. &lt;font style="font-family: NewsGoth BT, Sans-Serif"&gt;&amp;#160;&lt;/font&gt;As&#13;interest rates rise, the value of Fund shares is likely to decline. &amp;#160;Conversely, when interest rates decline, the value of&#13;Fund shares is likely to rise. &amp;#160;Obligations with longer maturities generally offer higher yields, but involve greater risk&#13;because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.&#13;&amp;#160;In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay&#13;or &amp;#147;call&amp;#148; the obligation. &amp;#160;In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower&#13;yields. &amp;#160;Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby&#13;be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Credit Risk. &amp;#160;Changes in economic conditions or other&#13;circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead&#13;to defaults. Such defaults may reduce the value of Fund shares and income distributions. &amp;#160;The value of a fixed income security&#13;also may decline because of real or perceived concerns about the issuer&amp;#146;s ability to make principal and interest payments.&#13;&amp;#160;In addition, the credit rating of securities held by the Fund may be lowered if an issuer&amp;#146;s financial condition changes.&#13;&amp;#160;Municipal obligations may be insured as to principal and interest payments. &amp;#160;If the claims-paying ability or other rating&#13;of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected. &amp;#160;In the case of&#13;an insured bond, the bond&amp;#146;s rating will be deemed to be the higher of the rating assigned to the bond&amp;#146;s issuer or the&#13;insurer.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Lower Rated Investments.&lt;i&gt; &lt;/i&gt;&amp;#160;Investments&#13;rated below investment grade and comparable unrated securities (&amp;#147; junk bonds &amp;#148;) have speculative characteristics because&#13;of the credit risk associated with their issuers. &amp;#160;Changes in economic conditions or other circumstances typically have a&#13;greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers&#13;of higher rated investments. &amp;#160;An economic downturn generally leads to a higher non-payment rate, and a lower rated investment&#13;may lose significant value before a default occurs. &amp;#160;Lower rated investments typically are subject to greater price volatility&#13;and illiquidity than higher rated investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Derivatives Risk. &lt;i&gt;&amp;#160;&lt;/i&gt;The use of derivatives can&#13;lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative,&#13;due to failure of a counterparty or due to tax or regulatory constraints. &amp;#160;Derivatives may create economic leverage in the&#13;Fund, which magnifies the Fund&amp;#146;s exposure to the underlying investment. Derivatives risk may be more significant when derivatives&#13;are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position&#13;held by the Fund. &amp;#160;When derivatives are used to gain or limit exposure to a particular market or market segment, their performance&#13;may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose&#13;for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill&#13;and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events. &amp;#160;Derivative&#13;instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the&#13;value of the underlying instrument. &amp;#160;If a derivative&amp;#146;s counterparty is unable to honor its commitments, the value of&#13;Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.&#13;&amp;#160;The loss on derivative transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Leveraged Transactions. &amp;#160;Certain Fund transactions&#13;may give rise to a form of leverage. &amp;#160;Such transactions may include, among others, the use of when-issued, delayed delivery&#13;or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions. &amp;#160;The Fund is&#13;required to segregate liquid assets or otherwise cover the Fund&amp;#146;s obligation created by a transaction that may give rise&#13;to leverage. &amp;#160;The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do&#13;so to satisfy its obligations or to meet segregation requirements. &amp;#160;Leverage may cause the Fund to be more volatile than if&#13;it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the&#13;Fund&amp;#146;s portfolio securities. &amp;#160;The loss on leveraged transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Residual Interest Bonds. &lt;i&gt;&amp;#160;&lt;/i&gt;The Fund may&#13;enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate&#13;municipal bond. &amp;#160;The interest payments that the Fund receives on the residual interest bonds acquired in such transactions&#13;vary inversely with short-term interest rates, normally decreasing when short-term rates increase. &amp;#160;The value and market for&#13;residual interest bonds are volatile and such bonds may have limited liquidity. &amp;#160;As required by applicable accounting standards,&#13;the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income&#13;in an amount equal to this expense.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Sector and Geographic Concentration Risk. &amp;#160;Because the&#13;Fund will concentrate its investments in obligations issued in a particular state and may concentrate in certain sectors or types&#13;of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation&#13;and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for&#13;state-specific economic information.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks of Principal Only Investments. &amp;#160;Principal only&#13;investments entitle the holder to receive par value of such investment if held to maturity. &amp;#160;The values of principal only&#13;investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.&#13;&amp;#160;The Fund will accrue income on these investments and is required to distribute that income each year. &amp;#160;The Fund may&#13;be required to sell securities to obtain cash needed for such income distributions.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Tax Risk. &amp;#160;Income from tax-exempt municipal obligations&#13;could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service,&#13;or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund&amp;#146;s income may be taxable to shareholders&#13;subject to the federal alternative minimum tax.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks Associated with Active Management. &amp;#160;The Fund is&#13;an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser&#13;to develop and effectively implement strategies to achieve the Fund&amp;#146;s investment objective. &amp;#160;Subjective decisions made&#13;by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;General Fund Investing Risks. &amp;#160;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &amp;#160;All investments carry a certain amount of risk and there&#13;is no guarantee that the Fund will be able to achieve its investment objective. &amp;#160;Annual Fund Operating Expenses expressed&#13;as a percentage of the Fund&amp;#146;s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating&#13;Expenses may differ in the future. &amp;#160;Purchase and redemption activities by Fund shareholders may impact the management of the&#13;Fund and its ability to achieve its investment objective. &amp;#160;In addition, the redemption by one or more large shareholders or&#13;groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund. &amp;#160;&#13;Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value.&#13;An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation&#13;or any other government agency, entity or person. &amp;#160;Mutual funds, investment advisers, other market participants and many securities&#13;markets are subject to rules and regulations and the jurisdiction of one or more regulators.&amp;#160; Changes to applicable rules&#13;and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund&amp;#146;s ability&#13;to execute its investment strategy.&lt;/p&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskNarrativeTextBlock contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Municipal Bond Risk.&lt;i&gt; &lt;/i&gt;&amp;#160;The amount of public information&#13;available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance&#13;of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate&#13;bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other&#13;securities markets, which may limit an owner&amp;#146;s ability to sell its bonds at attractive prices. &amp;#160;The spread between the&#13;price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.&#13;&amp;#160;Less liquid obligations can become more difficult to value and be subject to erratic price movements. &amp;#160;The increased&#13;presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater&#13;volatility in the markets.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Debt Market Risk. &amp;#160;Economic and other events (whether&#13;real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value&#13;of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted. &amp;#160;Certain securities and other investments&#13;held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market&#13;may exceed the demand. &amp;#160;At other times, the demand for such instruments may exceed the supply in the market. &amp;#160;An imbalance&#13;in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading&#13;spreads and a lack of price transparency in the market. &amp;#160;No active trading market may exist for certain investments, which&#13;may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate&#13;such assets. Adverse market conditions may impair the liquidity of some actively traded investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Interest Rate Risk. &lt;font style="font-family: NewsGoth BT, Sans-Serif"&gt;&amp;#160;&lt;/font&gt;As&#13;interest rates rise, the value of Fund shares is likely to decline. &amp;#160;Conversely, when interest rates decline, the value of&#13;Fund shares is likely to rise. &amp;#160;Obligations with longer maturities generally offer higher yields, but involve greater risk&#13;because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.&#13;&amp;#160;In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay&#13;or &amp;#147;call&amp;#148; the obligation. &amp;#160;In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower&#13;yields. &amp;#160;Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby&#13;be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Credit Risk. &amp;#160;Changes in economic conditions or other&#13;circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead&#13;to defaults. Such defaults may reduce the value of Fund shares and income distributions. &amp;#160;The value of a fixed income security&#13;also may decline because of real or perceived concerns about the issuer&amp;#146;s ability to make principal and interest payments.&#13;&amp;#160;In addition, the credit rating of securities held by the Fund may be lowered if an issuer&amp;#146;s financial condition changes.&#13;&amp;#160;Municipal obligations may be insured as to principal and interest payments. &amp;#160;If the claims-paying ability or other rating&#13;of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected. &amp;#160;In the case of&#13;an insured bond, the bond&amp;#146;s rating will be deemed to be the higher of the rating assigned to the bond&amp;#146;s issuer or the&#13;insurer.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Lower Rated Investments.&lt;i&gt; &lt;/i&gt;&amp;#160;Investments&#13;rated below investment grade and comparable unrated securities (&amp;#147; junk bonds &amp;#148;) have speculative characteristics because&#13;of the credit risk associated with their issuers. &amp;#160;Changes in economic conditions or other circumstances typically have a&#13;greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers&#13;of higher rated investments. &amp;#160;An economic downturn generally leads to a higher non-payment rate, and a lower rated investment&#13;may lose significant value before a default occurs. &amp;#160;Lower rated investments typically are subject to greater price volatility&#13;and illiquidity than higher rated investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Derivatives Risk. &lt;i&gt;&amp;#160;&lt;/i&gt;The use of derivatives can&#13;lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative,&#13;due to failure of a counterparty or due to tax or regulatory constraints. &amp;#160;Derivatives may create economic leverage in the&#13;Fund, which magnifies the Fund&amp;#146;s exposure to the underlying investment. Derivatives risk may be more significant when derivatives&#13;are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position&#13;held by the Fund. &amp;#160;When derivatives are used to gain or limit exposure to a particular market or market segment, their performance&#13;may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose&#13;for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill&#13;and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events. &amp;#160;Derivative&#13;instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the&#13;value of the underlying instrument. &amp;#160;If a derivative&amp;#146;s counterparty is unable to honor its commitments, the value of&#13;Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.&#13;&amp;#160;The loss on derivative transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Leveraged Transactions. &amp;#160;Certain Fund transactions&#13;may give rise to a form of leverage. &amp;#160;Such transactions may include, among others, the use of when-issued, delayed delivery&#13;or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions. &amp;#160;The Fund is&#13;required to segregate liquid assets or otherwise cover the Fund&amp;#146;s obligation created by a transaction that may give rise&#13;to leverage. &amp;#160;The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do&#13;so to satisfy its obligations or to meet segregation requirements. &amp;#160;Leverage may cause the Fund to be more volatile than if&#13;it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the&#13;Fund&amp;#146;s portfolio securities. &amp;#160;The loss on leveraged transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Residual Interest Bonds. &lt;i&gt;&amp;#160;&lt;/i&gt;The Fund may&#13;enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate&#13;municipal bond. &amp;#160;The interest payments that the Fund receives on the residual interest bonds acquired in such transactions&#13;vary inversely with short-term interest rates, normally decreasing when short-term rates increase. &amp;#160;The value and market for&#13;residual interest bonds are volatile and such bonds may have limited liquidity. &amp;#160;As required by applicable accounting standards,&#13;the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income&#13;in an amount equal to this expense.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Sector and Geographic Concentration Risk. &amp;#160;Because the&#13;Fund will concentrate its investments in obligations issued in a particular state and may concentrate in certain sectors or types&#13;of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation&#13;and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for&#13;state-specific economic information.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks of Principal Only Investments. &amp;#160;Principal only&#13;investments entitle the holder to receive par value of such investment if held to maturity. &amp;#160;The values of principal only&#13;investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.&#13;&amp;#160;The Fund will accrue income on these investments and is required to distribute that income each year. &amp;#160;The Fund may&#13;be required to sell securities to obtain cash needed for such income distributions.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Tax Risk. &amp;#160;Income from tax-exempt municipal obligations&#13;could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service,&#13;or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund&amp;#146;s income may be taxable to shareholders&#13;subject to the federal alternative minimum tax.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks Associated with Active Management. &amp;#160;The Fund is&#13;an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser&#13;to develop and effectively implement strategies to achieve the Fund&amp;#146;s investment objective. &amp;#160;Subjective decisions made&#13;by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;General Fund Investing Risks. &amp;#160;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &amp;#160;All investments carry a certain amount of risk and there&#13;is no guarantee that the Fund will be able to achieve its investment objective. &amp;#160;Annual Fund Operating Expenses expressed&#13;as a percentage of the Fund&amp;#146;s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating&#13;Expenses may differ in the future. &amp;#160;Purchase and redemption activities by Fund shareholders may impact the management of the&#13;Fund and its ability to achieve its investment objective. &amp;#160;In addition, the redemption by one or more large shareholders or&#13;groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund. &amp;#160;Investors&#13;in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment&#13;in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other&#13;government agency, entity or person. &amp;#160;Mutual funds, investment advisers, other market participants and many securities markets&#13;are subject to rules and regulations and the jurisdiction of one or more regulators.&amp;#160; Changes to applicable rules and regulations&#13;could have an adverse affect on securities markets and market participants, as well as on the Fund&amp;#146;s ability to execute its&#13;investment strategy.&lt;/p&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskNarrativeTextBlock contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Municipal Bond Risk.&lt;i&gt; &lt;/i&gt;&amp;#160;The amount of public information&#13;available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance&#13;of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate&#13;bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other&#13;securities markets, which may limit an owner&amp;#146;s ability to sell its bonds at attractive prices. &amp;#160;The spread between the&#13;price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.&#13;&amp;#160;Less liquid obligations can become more difficult to value and be subject to erratic price movements. &amp;#160;The increased&#13;presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater&#13;volatility in the markets.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Debt Market Risk. &amp;#160;Economic and other events (whether&#13;real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value&#13;of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted. &amp;#160;Certain securities and other investments&#13;held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market&#13;may exceed the demand. &amp;#160;At other times, the demand for such instruments may exceed the supply in the market. &amp;#160;An imbalance&#13;in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading&#13;spreads and a lack of price transparency in the market. &amp;#160;No active trading market may exist for certain investments, which&#13;may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate&#13;such assets. Adverse market conditions may impair the liquidity of some actively traded investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Interest Rate Risk. &lt;font style="font-family: NewsGoth BT, Sans-Serif"&gt;&amp;#160;&lt;/font&gt;As&#13;interest rates rise, the value of Fund shares is likely to decline. &amp;#160;Conversely, when interest rates decline, the value of&#13;Fund shares is likely to rise. &amp;#160;Obligations with longer maturities generally offer higher yields, but involve greater risk&#13;because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.&#13;&amp;#160;In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay&#13;or &amp;#147;call&amp;#148; the obligation. &amp;#160;In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower&#13;yields. &amp;#160;Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby&#13;be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Credit Risk. &amp;#160;Changes in economic conditions or other&#13;circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead&#13;to defaults. Such defaults may reduce the value of Fund shares and income distributions. &amp;#160;The value of a fixed income security&#13;also may decline because of real or perceived concerns about the issuer&amp;#146;s ability to make principal and interest payments.&#13;&amp;#160;In addition, the credit rating of securities held by the Fund may be lowered if an issuer&amp;#146;s financial condition changes.&#13;&amp;#160;Municipal obligations may be insured as to principal and interest payments. If the claims-paying ability or other rating&#13;of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected. &amp;#160;In the case of&#13;an insured bond, the bond&amp;#146;s rating will be deemed to be the higher of the rating assigned to the bond&amp;#146;s issuer or the&#13;insurer.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Lower Rated Investments.&lt;i&gt; &lt;/i&gt;&amp;#160; Investments&#13;rated below investment grade and comparable unrated securities (&amp;#147;junk bonds&amp;#148;) have speculative characteristics because&#13;of the credit risk associated with their issuers. &amp;#160;Changes in economic conditions or other circumstances typically have a&#13;greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers&#13;of higher rated investments. &amp;#160;An economic downturn generally leads to a higher non-payment rate, and a lower rated investment&#13;may lose significant value before a default occurs. &amp;#160;Lower rated investments typically are subject to greater price volatility&#13;and illiquidity than higher rated investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Derivatives Risk. &lt;i&gt;&amp;#160; &lt;/i&gt;The use of derivatives can&#13;lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative,&#13;due to failure of a counterparty or due to tax or regulatory constraints. &amp;#160;Derivatives may create economic leverage in the&#13;Fund, which magnifies the Fund&amp;#146;s exposure to the underlying investment. Derivatives risk may be more significant when derivatives&#13;are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position&#13;held by the Fund. &amp;#160;When derivatives are used to gain or limit exposure to a particular market or market segment, their performance&#13;may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose&#13;for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill&#13;and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events. &amp;#160;Derivative&#13;instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the&#13;value of the underlying instrument. &amp;#160;If a derivative&amp;#146;s counterparty is unable to honor its commitments, the value of&#13;Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.&#13;&amp;#160;The loss on derivative transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Leveraged Transactions. &amp;#160;Certain Fund transactions&#13;may give rise to a form of leverage. &amp;#160;Such transactions may include, among others, the use of when-issued, delayed delivery&#13;or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions. &amp;#160;The Fund is&#13;required to segregate liquid assets or otherwise cover the Fund&amp;#146;s obligation created by a transaction that may give rise&#13;to leverage. &amp;#160;The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do&#13;so to satisfy its obligations or to meet segregation requirements. &amp;#160;Leverage may cause the Fund to be more volatile than if&#13;it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the&#13;Fund&amp;#146;s portfolio securities. &amp;#160;The loss on leveraged transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Residual Interest Bonds. &lt;i&gt;&amp;#160; &lt;/i&gt;The Fund may&#13;enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate&#13;municipal bond. &amp;#160;The interest payments that the Fund receives on the residual interest bonds acquired in such transactions&#13;vary inversely with short-term interest rates, normally decreasing when short-term rates increase. &amp;#160;The value and market for&#13;residual interest bonds are volatile and such bonds may have limited liquidity. &amp;#160;As required by applicable accounting standards,&#13;the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income&#13;in an amount equal to this expense.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Sector and Geographic Concentration Risk. &amp;#160;Because the&#13;Fund will concentrate its investments in obligations issued in a particular state and may concentrate in certain sectors or types&#13;of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation&#13;and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for&#13;state-specific economic information.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks of Principal Only Investments. &amp;#160;Principal only&#13;investments entitle the holder to receive par value of such investment if held to maturity. &amp;#160;The values of principal only&#13;investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.&#13;&amp;#160;The Fund will accrue income on these investments and is required to distribute that income each year. &amp;#160;The Fund may&#13;be required to sell securities to obtain cash needed for such income distributions.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Tax Risk. &amp;#160;Income from tax-exempt municipal obligations&#13;could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service,&#13;or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund&amp;#146;s income may be taxable to shareholders&#13;subject to the federal alternative minimum tax.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks Associated with Active Management. &amp;#160;The Fund is&#13;an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser&#13;to develop and effectively implement strategies to achieve the Fund&amp;#146;s investment objective. &amp;#160;Subjective decisions made&#13;by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;General Fund Investing Risks. &amp;#160;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &amp;#160;All investments carry a certain amount of risk and there&#13;is no guarantee that the Fund will be able to achieve its investment objective. &amp;#160;Annual Fund Operating Expenses expressed&#13;as a percentage of the Fund&amp;#146;s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating&#13;Expenses may differ in the future. &amp;#160;Purchase and redemption activities by Fund shareholders may impact the management of the&#13;Fund and its ability to achieve its investment objective. &amp;#160;In addition, the redemption by one or more large shareholders or&#13;groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund. &amp;#160;Investors&#13;in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment&#13;in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other&#13;government agency, entity or person. &amp;#160;Mutual funds, investment advisers, other market participants and many securities markets&#13;are subject to rules and regulations and the jurisdiction of one or more regulators.&amp;#160; Changes to applicable rules and regulations&#13;could have an adverse affect on securities markets and market participants, as well as on the Fund&amp;#146;s ability to execute its&#13;investment strategy.&lt;/p&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskNarrativeTextBlock contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Municipal Bond Risk.&lt;i&gt; &lt;/i&gt;&amp;#160;The amount of public information&#13;available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance&#13;of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate&#13;bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other&#13;securities markets, which may limit an owner&amp;#146;s ability to sell its bonds at attractive prices. &amp;#160;The spread between the&#13;price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.&#13;&amp;#160;Less liquid obligations can become more difficult to value and be subject to erratic price movements. &amp;#160;The increased&#13;presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater&#13;volatility in the markets.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Debt Market Risk. &amp;#160;Economic and other events (whether&#13;real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value&#13;of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted. &amp;#160;Certain securities and other investments&#13;held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market&#13;may exceed the demand. &amp;#160;At other times, the demand for such instruments may exceed the supply in the market. &amp;#160;An imbalance&#13;in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading&#13;spreads and a lack of price transparency in the market. &amp;#160;No active trading market may exist for certain investments, which&#13;may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate&#13;such assets. Adverse market conditions may impair the liquidity of some actively traded investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Interest Rate Risk. &lt;font style="font-family: NewsGoth BT, Sans-Serif"&gt;&amp;#160;&lt;/font&gt;As&#13;interest rates rise, the value of Fund shares is likely to decline. &amp;#160;Conversely, when interest rates decline, the value of&#13;Fund shares is likely to rise. &amp;#160;Obligations with longer maturities generally offer higher yields, but involve greater risk&#13;because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.&#13;&amp;#160;In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay&#13;or &amp;#147;call&amp;#148; the obligation. &amp;#160;In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower&#13;yields. &amp;#160;Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby&#13;be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Credit Risk. &amp;#160;Changes in economic conditions or other&#13;circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead&#13;to defaults. Such defaults may reduce the value of Fund shares and income distributions. &amp;#160;The value of a fixed income security&#13;also may decline because of real or perceived concerns about the issuer&amp;#146;s ability to make principal and interest payments.&#13;&amp;#160;In addition, the credit rating of securities held by the Fund may be lowered if an issuer&amp;#146;s financial condition changes.&#13;&amp;#160;Municipal obligations may be insured as to principal and interest payments. &amp;#160;If the claims-paying ability or other rating&#13;of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected. &amp;#160;In the case of&#13;an insured bond, the bond&amp;#146;s rating will be deemed to be the higher of the rating assigned to the bond&amp;#146;s issuer or the&#13;insurer.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Lower Rated Investments.&lt;i&gt; &lt;/i&gt;&amp;#160;Investments&#13;rated below investment grade and comparable unrated securities (&amp;#147;junk bonds&amp;#148;) have speculative characteristics because&#13;of the credit risk associated with their issuers. &amp;#160;Changes in economic conditions or other circumstances typically have a&#13;greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers&#13;of higher rated investments. &amp;#160;An economic downturn generally leads to a higher non-payment rate, and a lower rated investment&#13;may lose significant value before a default occurs. &amp;#160;Lower rated investments typically are subject to greater price volatility&#13;and illiquidity than higher rated investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Derivatives Risk. &lt;i&gt;&amp;#160;&lt;/i&gt;The use of derivatives can&#13;lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative,&#13;due to failure of a counterparty or due to tax or regulatory constraints. &amp;#160;Derivatives may create economic leverage in the&#13;Fund, which magnifies the Fund&amp;#146;s exposure to the underlying investment. Derivatives risk may be more significant when derivatives&#13;are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position&#13;held by the Fund. &amp;#160;When derivatives are used to gain or limit exposure to a particular market or market segment, their performance&#13;may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose&#13;for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill&#13;and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events. &amp;#160;Derivative&#13;instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the&#13;value of the underlying instrument. &amp;#160;If a derivative&amp;#146;s counterparty is unable to honor its commitments, the value of&#13;Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.&#13;&amp;#160;The loss on derivative transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Leveraged Transactions. &amp;#160;Certain Fund transactions&#13;may give rise to a form of leverage. &amp;#160;Such transactions may include, among others, the use of when-issued, delayed delivery&#13;or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions. &amp;#160;The Fund is&#13;required to segregate liquid assets or otherwise cover the Fund&amp;#146;s obligation created by a transaction that may give rise&#13;to leverage. &amp;#160;The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do&#13;so to satisfy its obligations or to meet segregation requirements. &amp;#160;Leverage may cause the Fund to be more volatile than if&#13;it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the&#13;Fund&amp;#146;s portfolio securities. &amp;#160;The loss on leveraged transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Residual Interest Bonds. &lt;i&gt;&amp;#160;&lt;/i&gt;The Fund may&#13;enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate&#13;municipal bond. &amp;#160;The interest payments that the Fund receives on the residual interest bonds acquired in such transactions&#13;vary inversely with short-term interest rates, normally decreasing when short-term rates increase. &amp;#160;The value and market for&#13;residual interest bonds are volatile and such bonds may have limited liquidity. &amp;#160;As required by applicable accounting standards,&#13;the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income&#13;in an amount equal to this expense.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Sector and Geographic Concentration Risk. &amp;#160;Because the&#13;Fund will concentrate its investments in obligations issued in a particular state and may concentrate in certain sectors or types&#13;of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation&#13;and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for&#13;state-specific economic information.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks of Principal Only Investments. &amp;#160;Principal only&#13;investments entitle the holder to receive par value of such investment if held to maturity. &amp;#160;The values of principal only&#13;investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.&#13;&amp;#160;The Fund will accrue income on these investments and is required to distribute that income each year. &amp;#160;The Fund may&#13;be required to sell securities to obtain cash needed for such income distributions.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Tax Risk. &amp;#160;Income from tax-exempt municipal obligations&#13;could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service,&#13;or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund&amp;#146;s income may be taxable to shareholders&#13;subject to the federal alternative minimum tax.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks Associated with Active Management. &amp;#160;The Fund is&#13;an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser&#13;to develop and effectively implement strategies to achieve the Fund&amp;#146;s investment objective. &amp;#160;Subjective decisions made&#13;by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;General Fund Investing Risks. &amp;#160;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &amp;#160;All investments carry a certain amount of risk and there&#13;is no guarantee that the Fund will be able to achieve its investment objective. &amp;#160;Annual Fund Operating Expenses expressed&#13;as a percentage of the Fund&amp;#146;s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating&#13;Expenses may differ in the future. &amp;#160;Purchase and redemption activities by Fund shareholders may impact the management of the&#13;Fund and its ability to achieve its investment objective. &amp;#160;In addition, the redemption by one or more large shareholders or&#13;groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund. &amp;#160;&#13;Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value.&#13;An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation&#13;or any other government agency, entity or person. &amp;#160;Mutual funds, investment advisers, other market participants and many securities&#13;markets are subject to rules and regulations and the jurisdiction of one or more regulators.&amp;#160; Changes to applicable rules&#13;and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund&amp;#146;s ability&#13;to execute its investment strategy.&lt;/p&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskNarrativeTextBlock contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Municipal Bond Risk.&lt;i&gt; &lt;/i&gt;&amp;#160;The amount of public information&#13;available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance&#13;of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate&#13;bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other&#13;securities markets, which may limit an owner&amp;#146;s ability to sell its bonds at attractive prices. &amp;#160;The spread between the&#13;price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.&#13;&amp;#160;Less liquid obligations can become more difficult to value and be subject to erratic price movements. &amp;#160;The increased&#13;presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater&#13;volatility in the markets.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Debt Market Risk. &amp;#160;Economic and other events (whether&#13;real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value&#13;of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted. &amp;#160;Certain securities and other investments&#13;held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market&#13;may exceed the demand. &amp;#160;At other times, the demand for such instruments may exceed the supply in the market. &amp;#160;An imbalance&#13;in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading&#13;spreads and a lack of price transparency in the market. &amp;#160;No active trading market may exist for certain investments, which&#13;may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate&#13;such assets. Adverse market conditions may impair the liquidity of some actively traded investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Interest Rate Risk. &lt;font style="font-family: NewsGoth BT, Sans-Serif"&gt;&amp;#160;&lt;/font&gt;As&#13;interest rates rise, the value of Fund shares is likely to decline. &amp;#160;Conversely, when interest rates decline, the value of&#13;Fund shares is likely to rise. &amp;#160;Obligations with longer maturities generally offer higher yields, but involve greater risk&#13;because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.&#13;&amp;#160;In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay&#13;or &amp;#147;call&amp;#148; the obligation. &amp;#160;In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower&#13;yields. &amp;#160;Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby&#13;be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Credit Risk. &amp;#160;Changes in economic conditions or other&#13;circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead&#13;to defaults. Such defaults may reduce the value of Fund shares and income distributions. &amp;#160;The value of a fixed income security&#13;also may decline because of real or perceived concerns about the issuer&amp;#146;s ability to make principal and interest payments.&#13;&amp;#160;In addition, the credit rating of securities held by the Fund may be lowered if an issuer&amp;#146;s financial condition changes.&#13;&amp;#160;Municipal obligations may be insured as to principal and interest payments. &amp;#160;If the claims-paying ability or other rating&#13;of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected. &amp;#160;In the case of&#13;an insured bond, the bond&amp;#146;s rating will be deemed to be the higher of the rating assigned to the bond&amp;#146;s issuer or the&#13;insurer.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Lower Rated Investments.&lt;i&gt; &lt;/i&gt;&amp;#160;Investments&#13;rated below investment grade and comparable unrated securities (&amp;#147; junk bonds &amp;#148;) have speculative characteristics because&#13;of the credit risk associated with their issuers. &amp;#160;Changes in economic conditions or other circumstances typically have a&#13;greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers&#13;of higher rated investments. &amp;#160;An economic downturn generally leads to a higher non-payment rate, and a lower rated investment&#13;may lose significant value before a default occurs. &amp;#160;Lower rated investments typically are subject to greater price volatility&#13;and illiquidity than higher rated investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Derivatives Risk. &lt;i&gt;&amp;#160;&lt;/i&gt;The use of derivatives can&#13;lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative,&#13;due to failure of a counterparty or due to tax or regulatory constraints. &amp;#160;Derivatives may create economic leverage in the&#13;Fund, which magnifies the Fund&amp;#146;s exposure to the underlying investment. Derivatives risk may be more significant when derivatives&#13;are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position&#13;held by the Fund. &amp;#160;When derivatives are used to gain or limit exposure to a particular market or market segment, their performance&#13;may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose&#13;for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill&#13;and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events. &amp;#160;Derivative&#13;instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the&#13;value of the underlying instrument. &amp;#160;If a derivative&amp;#146;s counterparty is unable to honor its commitments, the value of&#13;Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.&#13;&amp;#160;The loss on derivative transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Leveraged Transactions. &amp;#160;Certain Fund transactions&#13;may give rise to a form of leverage. &amp;#160;Such transactions may include, among others, the use of when-issued, delayed delivery&#13;or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions. &amp;#160;The Fund is&#13;required to segregate liquid assets or otherwise cover the Fund&amp;#146;s obligation created by a transaction that may give rise&#13;to leverage. &amp;#160;The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do&#13;so to satisfy its obligations or to meet segregation requirements. &amp;#160;Leverage may cause the Fund to be more volatile than if&#13;it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the&#13;Fund&amp;#146;s portfolio securities. &amp;#160;The loss on leveraged transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Residual Interest Bonds. &lt;i&gt;&amp;#160;&lt;/i&gt;The Fund may&#13;enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate&#13;municipal bond. &amp;#160;The interest payments that the Fund receives on the residual interest bonds acquired in such transactions&#13;vary inversely with short-term interest rates, normally decreasing when short-term rates increase. &amp;#160;The value and market for&#13;residual interest bonds are volatile and such bonds may have limited liquidity. &amp;#160;As required by applicable accounting standards,&#13;the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income&#13;in an amount equal to this expense.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Sector and Geographic Concentration Risk. &amp;#160;Because the&#13;Fund will concentrate its investments in obligations issued in a particular state and may concentrate in certain sectors or types&#13;of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation&#13;and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for&#13;state-specific economic information.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks of Principal Only Investments. &amp;#160;Principal only&#13;investments entitle the holder to receive par value of such investment if held to maturity. &amp;#160;The values of principal only&#13;investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.&#13;&amp;#160;The Fund will accrue income on these investments and is required to distribute that income each year. &amp;#160;The Fund may&#13;be required to sell securities to obtain cash needed for such income distributions.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Tax Risk. &amp;#160;Income from tax-exempt municipal obligations&#13;could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service,&#13;or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund&amp;#146;s income may be taxable to shareholders&#13;subject to the federal alternative minimum tax.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks Associated with Active Management. &amp;#160;The Fund is&#13;an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser&#13;to develop and effectively implement strategies to achieve the Fund&amp;#146;s investment objective. &amp;#160;Subjective decisions made&#13;by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;General Fund Investing Risks. &amp;#160;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &amp;#160;All investments carry a certain amount of risk and there&#13;is no guarantee that the Fund will be able to achieve its investment objective. &amp;#160;Annual Fund Operating Expenses expressed&#13;as a percentage of the Fund&amp;#146;s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating&#13;Expenses may differ in the future. &amp;#160;Purchase and redemption activities by Fund shareholders may impact the management of the&#13;Fund and its ability to achieve its investment objective. &amp;#160;In addition, the redemption by one or more large shareholders or&#13;groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund. &amp;#160;Investors&#13;in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment&#13;in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other&#13;government agency, entity or person. &amp;#160;Mutual funds, investment advisers, other market participants and many securities markets&#13;are subject to rules and regulations and the jurisdiction of one or more regulators.&amp;#160; Changes to applicable rules and regulations&#13;could have an adverse affect on securities markets and market participants, as well as on the Fund&amp;#146;s ability to execute its&#13;investment strategy.&lt;/p&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskNarrativeTextBlock contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Municipal Bond Risk.&lt;i&gt; &lt;/i&gt;&amp;#160;The amount of public information&#13;available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance&#13;of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate&#13;bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other&#13;securities markets, which may limit an owner&amp;#146;s ability to sell its bonds at attractive prices. &amp;#160;The spread between the&#13;price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.&#13;&amp;#160;Less liquid obligations can become more difficult to value and be subject to erratic price movements. &amp;#160;The increased&#13;presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater&#13;volatility in the markets.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Debt Market Risk. &amp;#160;Economic and other events (whether&#13;real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value&#13;of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted. &amp;#160;Certain securities and other investments&#13;held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market&#13;may exceed the demand. &amp;#160;At other times, the demand for such instruments may exceed the supply in the market. &amp;#160;An imbalance&#13;in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading&#13;spreads and a lack of price transparency in the market. &amp;#160;No active trading market may exist for certain investments, which&#13;may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate&#13;such assets. Adverse market conditions may impair the liquidity of some actively traded investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Interest Rate Risk. &lt;font style="font-family: NewsGoth BT, Sans-Serif"&gt;&amp;#160;&lt;/font&gt;As&#13;interest rates rise, the value of Fund shares is likely to decline. &amp;#160;Conversely, when interest rates decline, the value of&#13;Fund shares is likely to rise. &amp;#160;Obligations with longer maturities generally offer higher yields, but involve greater risk&#13;because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.&#13;&amp;#160;In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay&#13;or &amp;#147;call&amp;#148; the obligation. &amp;#160;In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower&#13;yields. &amp;#160;Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby&#13;be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Credit Risk. &amp;#160;Changes in economic conditions or other&#13;circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead&#13;to defaults. Such defaults may reduce the value of Fund shares and income distributions. &amp;#160;The value of a fixed income security&#13;also may decline because of real or perceived concerns about the issuer&amp;#146;s ability to make principal and interest payments.&#13;&amp;#160;In addition, the credit rating of securities held by the Fund may be lowered if an issuer&amp;#146;s financial condition changes.&#13;&amp;#160;Municipal obligations may be insured as to principal and interest payments. &amp;#160;If the claims-paying ability or other rating&#13;of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected. &amp;#160;In the case of&#13;an insured bond, the bond&amp;#146;s rating will be deemed to be the higher of the rating assigned to the bond&amp;#146;s issuer or the&#13;insurer.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Lower Rated Investments.&lt;i&gt; &lt;/i&gt;&amp;#160;Investments&#13;rated below investment grade and comparable unrated securities (&amp;#147; junk bonds &amp;#148;) have speculative characteristics because&#13;of the credit risk associated with their issuers. &amp;#160;Changes in economic conditions or other circumstances typically have a&#13;greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers&#13;of higher rated investments. &amp;#160;An economic downturn generally leads to a higher non-payment rate, and a lower rated investment&#13;may lose significant value before a default occurs. &amp;#160;Lower rated investments typically are subject to greater price volatility&#13;and illiquidity than higher rated investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Derivatives Risk. &lt;i&gt;&amp;#160;&lt;/i&gt;The use of derivatives can&#13;lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative,&#13;due to failure of a counterparty or due to tax or regulatory constraints. &amp;#160;Derivatives may create economic leverage in the&#13;Fund, which magnifies the Fund&amp;#146;s exposure to the underlying investment. Derivatives risk may be more significant when derivatives&#13;are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position&#13;held by the Fund. &amp;#160;When derivatives are used to gain or limit exposure to a particular market or market segment, their performance&#13;may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose&#13;for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill&#13;and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events. &amp;#160;Derivative&#13;instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the&#13;value of the underlying instrument. &amp;#160;If a derivative&amp;#146;s counterparty is unable to honor its commitments, the value of&#13;Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.&#13;&amp;#160;The loss on derivative transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Leveraged Transactions. &amp;#160;Certain Fund transactions&#13;may give rise to a form of leverage. &amp;#160;Such transactions may include, among others, the use of when-issued, delayed delivery&#13;or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions. &amp;#160;The Fund is&#13;required to segregate liquid assets or otherwise cover the Fund&amp;#146;s obligation created by a transaction that may give rise&#13;to leverage. &amp;#160;The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do&#13;so to satisfy its obligations or to meet segregation requirements. &amp;#160;Leverage may cause the Fund to be more volatile than if&#13;it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the&#13;Fund&amp;#146;s portfolio securities. &amp;#160;The loss on leveraged transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Residual Interest Bonds. &lt;i&gt;&amp;#160;&lt;/i&gt;The Fund may&#13;enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate&#13;municipal bond. &amp;#160;The interest payments that the Fund receives on the residual interest bonds acquired in such transactions&#13;vary inversely with short-term interest rates, normally decreasing when short-term rates increase. &amp;#160;The value and market for&#13;residual interest bonds are volatile and such bonds may have limited liquidity. &amp;#160;As required by applicable accounting standards,&#13;the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income&#13;in an amount equal to this expense.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Sector and Geographic Concentration Risk. &amp;#160;Because the&#13;Fund will concentrate its investments in obligations issued in a particular state and may concentrate in certain sectors or types&#13;of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation&#13;and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for&#13;state-specific economic information.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks of Principal Only Investments. &amp;#160;Principal only&#13;investments entitle the holder to receive par value of such investment if held to maturity. &amp;#160;The values of principal only&#13;investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.&#13;&amp;#160;The Fund will accrue income on these investments and is required to distribute that income each year. &amp;#160;The Fund may&#13;be required to sell securities to obtain cash needed for such income distributions.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Tax Risk. &amp;#160;Income from tax-exempt municipal obligations&#13;could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service,&#13;or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund&amp;#146;s income may be taxable to shareholders&#13;subject to the federal alternative minimum tax.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks Associated with Active Management. &amp;#160;The Fund is&#13;an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser&#13;to develop and effectively implement strategies to achieve the Fund&amp;#146;s investment objective. &amp;#160;Subjective decisions made&#13;by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;General Fund Investing Risks. &amp;#160;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &amp;#160;All investments carry a certain amount of risk and there&#13;is no guarantee that the Fund will be able to achieve its investment objective. &amp;#160;Annual Fund Operating Expenses expressed&#13;as a percentage of the Fund&amp;#146;s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating&#13;Expenses may differ in the future. &amp;#160;Purchase and redemption activities by Fund shareholders may impact the management of the&#13;Fund and its ability to achieve its investment objective. &amp;#160; In addition, the redemption by one or more large shareholders&#13;or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund.&#13;&amp;#160; Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines&#13;in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance&#13;Corporation or any other government agency, entity or person. &amp;#160;Mutual funds, investment advisers, other market participants&#13;and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators.&amp;#160; Changes&#13;to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the&#13;Fund&amp;#146;s ability to execute its investment strategy.&lt;/p&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskNarrativeTextBlock contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Municipal Bond Risk.&lt;i&gt; &lt;/i&gt;&amp;#160;The amount of public information&#13;available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance&#13;of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate&#13;bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other&#13;securities markets, which may limit an owner&amp;#146;s ability to sell its bonds at attractive prices. &amp;#160;The spread between the&#13;price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.&#13;&amp;#160;Less liquid obligations can become more difficult to value and be subject to erratic price movements. &amp;#160;The increased&#13;presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater&#13;volatility in the markets.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Debt Market Risk. &amp;#160;Economic and other events (whether&#13;real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value&#13;of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted. &amp;#160;Certain securities and other investments&#13;held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market&#13;may exceed the demand. &amp;#160;At other times, the demand for such instruments may exceed the supply in the market. &amp;#160;An imbalance&#13;in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading&#13;spreads and a lack of price transparency in the market. &amp;#160;No active trading market may exist for certain investments, which&#13;may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate&#13;such assets. Adverse market conditions may impair the liquidity of some actively traded investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Interest Rate Risk. &lt;font style="font-family: NewsGoth BT, Sans-Serif"&gt;&amp;#160;&lt;/font&gt;As&#13;interest rates rise, the value of Fund shares is likely to decline. &amp;#160;Conversely, when interest rates decline, the value of&#13;Fund shares is likely to rise. &amp;#160;Obligations with longer maturities generally offer higher yields, but involve greater risk&#13;because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.&#13;&amp;#160;In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay&#13;or &amp;#147;call&amp;#148; the obligation. &amp;#160;In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower&#13;yields. &amp;#160;Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby&#13;be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Credit Risk. &amp;#160;Changes in economic conditions or other&#13;circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead&#13;to defaults. Such defaults may reduce the value of Fund shares and income distributions. &amp;#160;The value of a fixed income security&#13;also may decline because of real or perceived concerns about the issuer&amp;#146;s ability to make principal and interest payments.&#13;&amp;#160;In addition, the credit rating of securities held by the Fund may be lowered if an issuer&amp;#146;s financial condition changes.&#13;&amp;#160;Municipal obligations may be insured as to principal and interest payments. &amp;#160;If the claims-paying ability or other rating&#13;of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected. &amp;#160;In the case of&#13;an insured bond, the bond&amp;#146;s rating will be deemed to be the higher of the rating assigned to the bond&amp;#146;s issuer or the&#13;insurer.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Lower Rated Investments.&lt;i&gt; &lt;/i&gt;&amp;#160;Investments&#13;rated below investment grade and comparable unrated securities (&amp;#147; junk bonds &amp;#148;) have speculative characteristics because&#13;of the credit risk associated with their issuers. &amp;#160;Changes in economic conditions or other circumstances typically have a&#13;greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers&#13;of higher rated investments. &amp;#160;An economic downturn generally leads to a higher non-payment rate, and a lower rated investment&#13;may lose significant value before a default occurs. &amp;#160;Lower rated investments typically are subject to greater price volatility&#13;and illiquidity than higher rated investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Derivatives Risk. &lt;i&gt;&amp;#160;&lt;/i&gt;The use of derivatives can&#13;lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative,&#13;due to failure of a counterparty or due to tax or regulatory constraints. &amp;#160;Derivatives may create economic leverage in the&#13;Fund, which magnifies the Fund&amp;#146;s exposure to the underlying investment. Derivatives risk may be more significant when derivatives&#13;are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position&#13;held by the Fund. &amp;#160;When derivatives are used to gain or limit exposure to a particular market or market segment, their performance&#13;may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose&#13;for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill&#13;and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events. &amp;#160;Derivative&#13;instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the&#13;value of the underlying instrument. &amp;#160;If a derivative&amp;#146;s counterparty is unable to honor its commitments, the value of&#13;Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.&#13;&amp;#160;The loss on derivative transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Leveraged Transactions. &amp;#160;Certain Fund transactions&#13;may give rise to a form of leverage. &amp;#160;Such transactions may include, among others, the use of when-issued, delayed delivery&#13;or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions. &amp;#160;The Fund is&#13;required to segregate liquid assets or otherwise cover the Fund&amp;#146;s obligation created by a transaction that may give rise&#13;to leverage. &amp;#160;The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do&#13;so to satisfy its obligations or to meet segregation requirements. &amp;#160;Leverage may cause the Fund to be more volatile than if&#13;it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the&#13;Fund&amp;#146;s portfolio securities. &amp;#160;The loss on leveraged transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Residual Interest Bonds. &lt;i&gt;&amp;#160;&lt;/i&gt;The Fund may&#13;enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate&#13;municipal bond. &amp;#160;The interest payments that the Fund receives on the residual interest bonds acquired in such transactions&#13;vary inversely with short-term interest rates, normally decreasing when short-term rates increase. &amp;#160;The value and market for&#13;residual interest bonds are volatile and such bonds may have limited liquidity. &amp;#160;As required by applicable accounting standards,&#13;the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income&#13;in an amount equal to this expense.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Sector and Geographic Concentration Risk. &amp;#160;Because the&#13;Fund will concentrate its investments in obligations issued in a particular state and may concentrate in certain sectors or types&#13;of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation&#13;and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for&#13;state-specific economic information.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks of Principal Only Investments. &amp;#160;Principal only&#13;investments entitle the holder to receive par value of such investment if held to maturity. &amp;#160;The values of principal only&#13;investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.&#13;&amp;#160;The Fund will accrue income on these investments and is required to distribute that income each year. &amp;#160;The Fund may&#13;be required to sell securities to obtain cash needed for such income distributions.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Tax Risk. &amp;#160;Income from tax-exempt municipal obligations&#13;could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service,&#13;or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund&amp;#146;s income may be taxable to shareholders&#13;subject to the federal alternative minimum tax.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks Associated with Active Management. &amp;#160;The Fund is&#13;an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser&#13;to develop and effectively implement strategies to achieve the Fund&amp;#146;s investment objective. &amp;#160;Subjective decisions made&#13;by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;General Fund Investing Risks. &amp;#160;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &amp;#160;All investments carry a certain amount of risk and there&#13;is no guarantee that the Fund will be able to achieve its investment objective. &amp;#160;Annual Fund Operating Expenses expressed&#13;as a percentage of the Fund&amp;#146;s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating&#13;Expenses may differ in the future. &amp;#160;Purchase and redemption activities by Fund shareholders may impact the management of the&#13;Fund and its ability to achieve its investment objective. &amp;#160;In addition, the redemption by one or more large shareholders or&#13;groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund. &amp;#160;&#13;Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value.&#13;An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation&#13;or any other government agency, entity or person. &amp;#160;Mutual funds, investment advisers, other market participants and many securities&#13;markets are subject to rules and regulations and the jurisdiction of one or more regulators.&amp;#160; Changes to applicable rules&#13;and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund&amp;#146;s ability&#13;to execute its investment strategy.&lt;/p&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskNarrativeTextBlock contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Municipal Bond Risk.&lt;i&gt; &lt;/i&gt;&amp;#160;The amount of public information&#13;available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance&#13;of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate&#13;bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other&#13;securities markets, which may limit an owner&amp;#146;s ability to sell its bonds at attractive prices. &amp;#160;The spread between the&#13;price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress.&#13;&amp;#160;Less liquid obligations can become more difficult to value and be subject to erratic price movements. &amp;#160;The increased&#13;presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater&#13;volatility in the markets.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Debt Market Risk. &amp;#160;Economic and other events (whether&#13;real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value&#13;of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted. &amp;#160;Certain securities and other investments&#13;held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market&#13;may exceed the demand. &amp;#160;At other times, the demand for such instruments may exceed the supply in the market. &amp;#160;An imbalance&#13;in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading&#13;spreads and a lack of price transparency in the market. &amp;#160;No active trading market may exist for certain investments, which&#13;may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate&#13;such assets. Adverse market conditions may impair the liquidity of some actively traded investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Interest Rate Risk. &lt;font style="font-family: NewsGoth BT, Sans-Serif"&gt;&amp;#160;&lt;/font&gt;As&#13;interest rates rise, the value of Fund shares is likely to decline. &amp;#160;Conversely, when interest rates decline, the value of&#13;Fund shares is likely to rise. &amp;#160;Obligations with longer maturities generally offer higher yields, but involve greater risk&#13;because the prices of such obligations are more sensitive to changes in interest rates than obligations with shorter maturities.&#13;&amp;#160;In a declining interest rate environment, prepayments of obligations may increase if the issuer has the ability to pre-pay&#13;or &amp;#147;call&amp;#148; the obligation. &amp;#160;In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower&#13;yields. &amp;#160;Because the Fund is managed toward an income objective, it may hold more longer-maturity obligations and thereby&#13;be more exposed to interest rate risk than municipal income funds that are managed with a greater emphasis on total return.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Credit Risk. &amp;#160;Changes in economic conditions or other&#13;circumstances may reduce the capacity of issuers of fixed income securities to make principal and interest payments and may lead&#13;to defaults. Such defaults may reduce the value of Fund shares and income distributions. &amp;#160;The value of a fixed income security&#13;also may decline because of real or perceived concerns about the issuer&amp;#146;s ability to make principal and interest payments.&#13;&amp;#160;In addition, the credit rating of securities held by the Fund may be lowered if an issuer&amp;#146;s financial condition changes.&#13;&amp;#160;Municipal obligations may be insured as to principal and interest payments. &amp;#160;If the claims-paying ability or other rating&#13;of the insurer is downgraded by a rating agency, the value of such obligations may be negatively affected. &amp;#160;In the case of&#13;an insured bond, the bond&amp;#146;s rating will be deemed to be the higher of the rating assigned to the bond&amp;#146;s issuer or the&#13;insurer.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Lower Rated Investments.&lt;i&gt; &lt;/i&gt;&amp;#160;Investments&#13;rated below investment grade and comparable unrated securities (&amp;#147; junk bonds &amp;#148;) have speculative characteristics because&#13;of the credit risk associated with their issuers. &amp;#160;Changes in economic conditions or other circumstances typically have a&#13;greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers&#13;of higher rated investments. &amp;#160;An economic downturn generally leads to a higher non-payment rate, and a lower rated investment&#13;may lose significant value before a default occurs. &amp;#160;Lower rated investments typically are subject to greater price volatility&#13;and illiquidity than higher rated investments.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Derivatives Risk. &lt;i&gt;&amp;#160;&lt;/i&gt;The use of derivatives can&#13;lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative,&#13;due to failure of a counterparty or due to tax or regulatory constraints. &amp;#160;Derivatives may create economic leverage in the&#13;Fund, which magnifies the Fund&amp;#146;s exposure to the underlying investment. Derivatives risk may be more significant when derivatives&#13;are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position&#13;held by the Fund. &amp;#160;When derivatives are used to gain or limit exposure to a particular market or market segment, their performance&#13;may not correlate as expected to the performance of such market thereby causing the Fund to fail to achieve its original purpose&#13;for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill&#13;and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events. &amp;#160;Derivative&#13;instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the&#13;value of the underlying instrument. &amp;#160;If a derivative&amp;#146;s counterparty is unable to honor its commitments, the value of&#13;Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty.&#13;&amp;#160;The loss on derivative transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Leveraged Transactions. &amp;#160;Certain Fund transactions&#13;may give rise to a form of leverage. &amp;#160;Such transactions may include, among others, the use of when-issued, delayed delivery&#13;or forward commitment transactions, residual interest bonds, short sales and certain derivative transactions. &amp;#160;The Fund is&#13;required to segregate liquid assets or otherwise cover the Fund&amp;#146;s obligation created by a transaction that may give rise&#13;to leverage. &amp;#160;The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do&#13;so to satisfy its obligations or to meet segregation requirements. &amp;#160;Leverage may cause the Fund to be more volatile than if&#13;it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the&#13;Fund&amp;#146;s portfolio securities. &amp;#160;The loss on leveraged transactions may substantially exceed the initial investment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risk of Residual Interest Bonds. &lt;i&gt;&amp;#160;&lt;/i&gt;The Fund may&#13;enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate&#13;municipal bond. &amp;#160;The interest payments that the Fund receives on the residual interest bonds acquired in such transactions&#13;vary inversely with short-term interest rates, normally decreasing when short-term rates increase. &amp;#160;The value and market for&#13;residual interest bonds are volatile and such bonds may have limited liquidity. &amp;#160;As required by applicable accounting standards,&#13;the Fund records interest expense on its liability with respect to floating-rate notes and also records offsetting interest income&#13;in an amount equal to this expense.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Sector and Geographic Concentration Risk. &amp;#160;Because the&#13;Fund will concentrate its investments in obligations issued in a particular state and may concentrate in certain sectors or types&#13;of obligations, the value of Fund shares may be affected by events that adversely affect that state, sector or type of obligation&#13;and may fluctuate more than that of a less concentrated fund. Please refer to the Fund's Statement of Additional Information for&#13;state-specific economic information.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks of Principal Only Investments. &amp;#160;Principal only&#13;investments entitle the holder to receive par value of such investment if held to maturity. &amp;#160;The values of principal only&#13;investments are subject to greater fluctuation in response to changes in market interest rates than bonds which pay interest currently.&#13;&amp;#160;The Fund will accrue income on these investments and is required to distribute that income each year. &amp;#160;The Fund may&#13;be required to sell securities to obtain cash needed for such income distributions.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Tax Risk. &amp;#160;Income from tax-exempt municipal obligations&#13;could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service,&#13;or state tax authorities or non-compliant conduct of a bond issuer. A portion of the Fund&amp;#146;s income may be taxable to shareholders&#13;subject to the federal alternative minimum tax.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Risks Associated with Active Management. &amp;#160;The Fund is&#13;an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser&#13;to develop and effectively implement strategies to achieve the Fund&amp;#146;s investment objective. &amp;#160;Subjective decisions made&#13;by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;General Fund Investing Risks. &amp;#160;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &amp;#160;All investments carry a certain amount of risk and there&#13;is no guarantee that the Fund will be able to achieve its investment objective. &amp;#160;Annual Fund Operating Expenses expressed&#13;as a percentage of the Fund&amp;#146;s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating&#13;Expenses may differ in the future. &amp;#160;Purchase and redemption activities by Fund shareholders may impact the management of the&#13;Fund and its ability to achieve its investment objective. &amp;#160; In addition, the redemption by one or more large shareholders&#13;or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund.&#13;&amp;#160; Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines&#13;in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance&#13;Corporation or any other government agency, entity or person. &amp;#160;Mutual funds, investment advisers, other market participants&#13;and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators.&amp;#160; Changes&#13;to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the&#13;Fund&amp;#146;s ability to execute its investment strategy.&lt;/p&gt;</rr:RiskNarrativeTextBlock>
    <rr:BarChartAndPerformanceTableHeading contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Performance&lt;/p&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:BarChartAndPerformanceTableHeading contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Performance&lt;/p&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:BarChartAndPerformanceTableHeading contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Performance&lt;/p&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:BarChartAndPerformanceTableHeading contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Performance&lt;/p&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:BarChartAndPerformanceTableHeading contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Performance&lt;/p&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:BarChartAndPerformanceTableHeading contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Performance&lt;/p&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:BarChartAndPerformanceTableHeading contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Performance&lt;/p&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:BarChartAndPerformanceTableHeading contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Performance&lt;/p&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:BarChartAndPerformanceTableHeading contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Performance&lt;/p&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:BarChartAndPerformanceTableHeading contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Performance&lt;/p&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:BarChartAndPerformanceTableHeading contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 12pt Times New Roman, Times, Serif; margin: 3.75pt 0"&gt;Performance&lt;/p&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;Past performance (both before and after taxes) is no guarantee of future results. &amp;#160;Updated Fund performance information can&#13;be obtained by visiting www.eatonvance.com.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&lt;/p&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceNarrativeTextBlock contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&amp;#160;Past performance (both before and after taxes) is no guarantee of future results. &amp;#160;Updated Fund performance information&#13;can be obtained by visiting www.eatonvance.com. &amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&lt;/p&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceNarrativeTextBlock contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&amp;#160;Past performance (both before and after taxes) is no guarantee of future results. &amp;#160;Updated Fund performance information&#13;can be obtained by visiting www.eatonvance.com.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&lt;/p&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceNarrativeTextBlock contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&amp;#160;Past performance (both before and after taxes) is no guarantee of future results. &amp;#160;Updated Fund performance information&#13;can be obtained by visiting www.eatonvance.com.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&amp;#160;&lt;/p&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceNarrativeTextBlock contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&amp;#160;Past performance (both before and after taxes) is no guarantee of future results. &amp;#160;Updated Fund performance information&#13;can be obtained by visiting www.eatonvance.com.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&lt;/p&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceNarrativeTextBlock contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&amp;#160;Past performance (both before and after taxes) is no guarantee of future results. &amp;#160;Updated Fund performance information&#13;can be obtained by visiting www.eatonvance.com. &amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt"&gt;&lt;/p&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceNarrativeTextBlock contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&amp;#160;Past performance (both before and after taxes) is no guarantee of future results. &amp;#160;Updated Fund performance information&#13;can be obtained by visiting www.eatonvance.com.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&lt;/p&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceNarrativeTextBlock contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&amp;#160;Past performance (both before and after taxes) is no guarantee of future results. &amp;#160;Updated Fund performance information&#13;can be obtained by visiting www.eatonvance.com. &amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&amp;#160;&lt;/p&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceNarrativeTextBlock contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&amp;#160;Past performance (both before and after taxes) is no guarantee of future results. &amp;#160;Updated Fund performance information&#13;can be obtained by visiting www.eatonvance.com.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&lt;/p&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceNarrativeTextBlock contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&amp;#160;Past performance (both before and after taxes) is no guarantee of future results. &amp;#160;Updated Fund performance information&#13;can be obtained by visiting www.eatonvance.com.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&lt;/p&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceNarrativeTextBlock contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&amp;#160;Past performance (both before and after taxes) is no guarantee of future results. &amp;#160;Updated Fund performance information&#13;can be obtained by visiting www.eatonvance.com.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&lt;/p&gt;</rr:PerformanceNarrativeTextBlock>
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    <rr:BarChartClosingTextBlock contextRef="AsOf2012-12-20_S000004838Member">During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was 9. 60 % for the quarter ended September 30, 2009, and the lowest quarterly return was &amp;#150;5.&#13;69 % for the quarter ended September 30, 2008. &amp;#160;The year-to-date total return through the end of the most recent calendar&#13;quarter (December 31, 2011 to September 30, 2012 ) was 6. 99 %. &amp;#160;&amp;#160;For the 30 days ended August 31, 2012 , the SEC yield&#13;and SEC tax-equivalent yield (assuming a combined state and federal income tax rate of 38.25%) for Class A shares were 2.21 % and&#13;3.58 %, respectively, for Class B shares were 1.57 % and 2.54 %, respectively, for Class C shares were 1.57 % and 2.54 %, respectively,&#13;and for Class I shares were 2.52 % and 4.08 %, respectively. &amp;#160;A lower tax rate would result in lower tax-equivalent yields.&#13;&amp;#160;For current yield information call 1-800-262-1122.</rr:BarChartClosingTextBlock>
    <rr:BarChartClosingTextBlock contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011, the highest&#13;quarterly total return for Class A was 10.73% for the quarter ended March 31, 2009, and the lowest quarterly return was &amp;#150;10.90%&#13;for the quarter ended December 31, 2008. &amp;#160;The year-to-date total return through the end of the most recent calendar quarter&#13;(December 31, 2011 to September 30, 2012) was 5.59%. &amp;#160;For the 30 days ended August 31, 2012, the SEC yield and SEC tax-equivalent&#13;yield (assuming a combined state and federal income tax rate of 39.55%) for Class A shares were 2.18% and 3.61%, respectively,&#13;for Class B shares were 1.54% and 2.55%, respectively, for Class C shares were 1.54% and 2.55%, respectively, and for Class I shares&#13;were 2.48% and 4.10%, respectively. &amp;#160;A lower tax rate would result in lower tax-equivalent yields. &amp;#160;For current yield&#13;information call 1-800-262-1122.&lt;/p&gt;</rr:BarChartClosingTextBlock>
    <rr:BarChartClosingTextBlock contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was 10. 21 % for the quarter ended March 31, 2009, and the lowest quarterly return was &amp;#150;10.&#13;24 % for the quarter ended December 31, 2008. &amp;#160;The year-to-date total return through the end of the most recent calendar quarter&#13;(December 31, 2011 to September 30, 2012 ) was 7.89 %. &amp;#160;For the 30 days ended August 31, 2012 , the SEC yield and SEC tax-equivalent&#13;yield (assuming a combined state and federal income tax rate of 38.90%) for Class A shares were 2.68 % and 4.39 %, respectively,&#13;for Class B shares were 2.06 % and 3.37 %, respectively, for Class C shares were 2.07 % and 3.39 %, respectively, and for Class&#13;I shares were 3.01 % and 4.93 %, respectively. &amp;#160;A lower tax rate would result in lower tax-equivalent yields. &amp;#160;For current&#13;yield information call 1-800-262-1122.&lt;/p&gt;</rr:BarChartClosingTextBlock>
    <rr:BarChartClosingTextBlock contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was 8. 37 % for the quarter ended September 30, 2009, and the lowest quarterly return was &amp;#150;6.&#13;37 % for the quarter ended December 31, 2008. &amp;#160;The year-to-date total return through the end of the most recent calendar quarter&#13;(December 31, 2011 to September 30, 2012 ) was 6.69 %. For the 30 days ended August 31, 2012 , the SEC yield and SEC tax-equivalent&#13;yield (assuming a combined state and federal income tax rate of 38.90%) for Class A shares were 2.51 % and 4.11 %, respectively,&#13;for Class B shares were 1.89 % and 3.09 %, respectively, for Class C shares were 1.90 % and 3.11 %, respectively, and for Class&#13;I shares were 2.88 % and 4.71 %, respectively. &amp;#160;&amp;#160;A lower tax rate would result in lower tax-equivalent yields. &amp;#160;For&#13;current yield information call 1-800-262-1122.&lt;/p&gt;</rr:BarChartClosingTextBlock>
    <rr:BarChartClosingTextBlock contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was 9. 93 % for the quarter ended September 30, 2009, and the lowest quarterly return was &amp;#150;&#13;9.86 % for the quarter ended December 31, 2008. &amp;#160;The year-to-date total return through the end of the most recent calendar&#13;quarter (December 31, 2011 to September 30, 2012 ) was 7. 19 %. &amp;#160;&amp;#160;For the 30 days ended August 31, 2012 , the SEC yield&#13;and SEC tax-equivalent yield (assuming a combined state and federal income tax rate of 38. 74 %) for Class A shares were 2.37 %&#13;and 3.87 %, respectively, for Class B shares were 1.75 % and 2.86 %, respectively, for Class C shares were 1.74 % and 2.84 %, respectively,&#13;and for Class I shares were 2.69 % and 4.39 %, respectively. &amp;#160;A lower tax rate would result in lower tax-equivalent yields.&#13;&amp;#160;For current yield information call 1-800-262-1122.&lt;/p&gt;</rr:BarChartClosingTextBlock>
    <rr:BarChartClosingTextBlock contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011, the highest&#13;quarterly total return for Class A was 9.50% for the quarter ended September 30, 2009, and the lowest quarterly return was &amp;#150;6.76%&#13;for the quarter ended December 31, 2008. &amp;#160;The year-to-date total return through the end of the most recent calendar quarter&#13;(December 31, 2011 to September 30, 2012) was 7.56%. &amp;#160;For the 30 days ended August 31, 2012, the SEC yield and SEC tax-equivalent&#13;yield (assuming a combined state and federal income tax rate of 38.90%) for Class A shares were 2.26% and 3.70%, respectively,&#13;for Class B shares were 1.63% and 2.67%, respectively, for Class C shares were 1.63% and 2.67%, respectively, and for Class I shares&#13;were 2.57% and 4.21%, respectively. &amp;#160;A lower tax rate would result in lower tax-equivalent yields. &amp;#160;For current yield&#13;information call 1-800-262-1122.&lt;/p&gt;</rr:BarChartClosingTextBlock>
    <rr:BarChartClosingTextBlock contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was 11. 30 % for the quarter ended September 30, 2009, and the lowest quarterly return was -&#13;7. 61 % for the quarter ended December 31, 2008. &amp;#160;The year-to-date total return through the end of the most recent calendar&#13;quarter (December 31, 2011 to September 30, 2012 ) was 9.01 %. &amp;#160;&amp;#160;For the 30 days ended August 31, 2012 , the SEC yield&#13;and SEC tax-equivalent yield (assuming a combined state and federal income tax rate of 40.04%) for Class A shares were 2.34 % and&#13;3.90 %, respectively, for Class B shares were 1.72 % and 2.87 %, respectively, for Class C shares were 1.71 % and 2 .85%, respectively,&#13;and for Class I shares were 2.66 % and 4.44 %, respectively. &amp;#160;A lower tax rate would result in lower tax-equivalent yields.&#13;&amp;#160;For current yield information call 1-800-262-1122.&lt;/p&gt;</rr:BarChartClosingTextBlock>
    <rr:BarChartClosingTextBlock contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was 12. 43 % for the quarter ended September 30, 2009, and the lowest quarterly return was -&#13;9. 74 % for the quarter ended December 31, 2008. &amp;#160;The year-to-date total return through the end of the most recent calendar&#13;quarter (December 31, 2011 to September 30, 2012 ) was 11.08 %. &amp;#160;For the 30 days ended August 31, 2012 , the SEC yield and&#13;SEC tax-equivalent yield (assuming a combined state and federal income tax rate of 41.44 %) for Class A shares were 3.14 % and&#13;5.36 %, respectively, for Class B shares were 2.56 % and 4.37 %, respectively, for Class C shares were 2.55 % and 4.35 %, respectively,&#13;and for Class I shares were 3.48 % and 5.94 %, respectively. &amp;#160;A lower tax rate would result in lower tax-equivalent yields.&#13;&amp;#160;For current yield information call 1-800-262-1122.&lt;/p&gt;</rr:BarChartClosingTextBlock>
    <rr:BarChartClosingTextBlock contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was 12. 11 % for the quarter ended September 30, 2009, and the lowest quarterly return was -9.83&#13;% for the quarter ended December 31, 2008. &amp;#160;The year-to-date total return through the end of the most recent calendar quarter&#13;(December 31, 2011 to September 30, 2012 ) was 9.57 %. &amp;#160;&amp;#160;For the 30 days ended August 31, 2012 , the SEC yield and SEC&#13;tax-equivalent yield (assuming a combined state and federal income tax rate of 39.55%) for Class A shares were 2.84 % and 4.70&#13;%, respectively, for Class B shares were 2.24 % and 3.71 %, respectively, for Class C shares were 2.24 % and 3.71 %, respectively,&#13;and for Class I shares were 3.19 % and 5.28 %, respectively. &amp;#160;A lower tax rate would result in lower tax-equivalent yields.&#13;&amp;#160;For current yield information call 1-800-262-1122.&lt;/p&gt;</rr:BarChartClosingTextBlock>
    <rr:BarChartClosingTextBlock contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was 8. 48 % for the quarter ended March 31, 2009, and the lowest quarterly return was &amp;#150;10.&#13;79 % for the quarter ended December 31, 2008. &amp;#160;The year-to-date total return through the end of the most recent calendar quarter&#13;(December 31, 2011 to September 30, 2012 was 6.79 %. &amp;#160;For the 30 days ended August 31, 2012 , the SEC yield and SEC tax-equivalent&#13;yield (assuming a combined state and federal income tax rate of 38.90%) for Class A shares were 2.23 % and 3.65 %, respectively,&#13;for Class B shares were 1.60 % and 2.62 %, respectively, for Class C shares were 1.59 % and 2.60 %, respectively, and for Class&#13;I shares were 2.54 % and 4.16 %, respectively. &amp;#160;A lower tax rate would result in lower tax-equivalent yields. &amp;#160;For current&#13;yield information call 1-800-262-1122.&lt;/p&gt;</rr:BarChartClosingTextBlock>
    <rr:BarChartClosingTextBlock contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class B was 12. 52 % for the quarter ended March 31, 2009, and the lowest quarterly return was &amp;#150;14.&#13;67 % for the quarter ended December 31, 2008. &amp;#160;The year-to-date total return through the end of the most recent calendar quarter&#13;(December 31, 2011 to September 30, 2012 ) was 7.52 %. &amp;#160;&amp;#160;For the 30 days ended August 31, 2012 , the SEC yield and SEC&#13;tax-equivalent yield (assuming a combined state and federal income tax rate of 38.74%) for Class A shares were 2.50 % and 4.08&#13;%, respectively, for Class B shares were 1.88 % and 3.07 %, respectively, for Class C shares were 1.88 and 3.07 %, respectively,&#13;and for Class I shares were 2.83 % and 4.62 %, respectively. &amp;#160;A lower tax rate would result in lower tax-equivalent yields.&#13;&amp;#160;For current yield information call 1-800-262-1122.&lt;/p&gt;</rr:BarChartClosingTextBlock>
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    <rr:PerformanceTableClosingTextBlock contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;These returns reflect the maximum sales charge for Class&#13;A (4.75%) and any applicable contingent deferred sales charge (&amp;#147;CDSC&amp;#148;) for Class B and Class C. &amp;#160;The Class C performance&#13;shown above for the period prior to March 21, 2006 (commencement of operations) is the performance of Class B shares, adjusted&#13;for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes)&#13;and the Class I performance shown above for the period prior to March 3, 2008 (commencement of operations) is the performance of&#13;Class A shares at net asset value without adjustment for any differences in the expenses of the two classes. &amp;#160;If adjusted&#13;for other expenses, returns would be different. &amp;#160;Investors cannot invest directly in an Index.&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;After-tax returns are calculated using the highest historical&#13;individual federal income tax rate and do not reflect the impact of state and local taxes. &amp;#160;Actual after-tax returns depend&#13;on a shareholder&amp;#146;s tax situation and the actual characterization of distributions, and may differ from those shown. &amp;#160;After-tax&#13;returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.&#13;&amp;#160;After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares. &amp;#160;Return&#13;After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions&#13;were made during that period. &amp;#160;Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater&#13;than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.&lt;/p&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableClosingTextBlock contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;These returns reflect the maximum sales charge for Class&#13;A (4.75%) and any applicable contingent deferred sales charge (&amp;#147;CDSC&amp;#148;) for Class B and Class C. &amp;#160;The Class C performance&#13;shown above for the period prior to April 28, 2006 (commencement of operations) is the performance of Class B shares, adjusted&#13;for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes)&#13;and the Class I performance shown above for the period prior to August 3, 2010 (commencement of operations) is the performance&#13;of Class A shares at net asset value without adjustment for any differences in the expenses of the two classes. &amp;#160;If adjusted&#13;for other expenses, returns would be different. &amp;#160;Investors cannot invest directly in an Index.&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;After-tax returns are calculated using the highest historical&#13;individual federal income tax rate and do not reflect the impact of state and local taxes. &amp;#160;Actual after-tax returns depend&#13;on a shareholder&amp;#146;s tax situation and the actual characterization of distributions, and may differ from those shown. &amp;#160;After-tax&#13;returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.&#13;&amp;#160;After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares. &amp;#160;Return&#13;After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions&#13;were made during that period. &amp;#160;Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater&#13;than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.&lt;/p&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableClosingTextBlock contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;These returns reflect the maximum sales charge for Class&#13;A (4.75%) and any applicable contingent deferred sales charge (&amp;#147;CDSC&amp;#148;) for Class B and Class C. &amp;#160;The Class C performance&#13;shown above for the period prior to April 25, 2006 (commencement of operations) is the performance of Class B shares, adjusted&#13;for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes)&#13;and the Class I performance shown above for the period prior to March 3, 2008 (commencement of operations) is the performance of&#13;Class A shares at net asset value without adjustment for any differences in the expenses of the two classes. &amp;#160;If adjusted&#13;for other expenses, returns would be different. &amp;#160;Investors cannot invest directly in an Index&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;After-tax returns are calculated using the highest historical&#13;individual federal income tax rate and do not reflect the impact of state and local taxes. &amp;#160;Actual after-tax returns depend&#13;on a shareholder&amp;#146;s tax situation and the actual characterization of distributions, and may differ from those shown. &amp;#160;After-tax&#13;returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.&#13;&amp;#160;After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares. &amp;#160;Return&#13;After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions&#13;were made during that period. &amp;#160;Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater&#13;than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.&lt;/p&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableClosingTextBlock contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;These returns reflect the maximum sales charge for Class&#13;A (4.75%) and any applicable contingent deferred sales charge (&amp;#147;CDSC&amp;#148;) for Class B and Class C. &amp;#160;The Class C performance&#13;shown above for the period prior to March 23, 2006 (commencement of operations) is the performance of Class B shares, adjusted&#13;for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes)&#13;and the Class I performance shown above for the period prior to August 3, 2010 (commencement of operations) is the performance&#13;of Class A shares at net asset value without adjustment for any differences in the expenses of the two classes. &amp;#160;If adjusted&#13;for other expenses, returns would be different. &amp;#160;Investors cannot invest directly in an Index.&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;After-tax returns are calculated using the highest historical&#13;individual federal income tax rate and do not reflect the impact of state and local taxes. &amp;#160;Actual after-tax returns depend&#13;on a shareholder&amp;#146;s tax situation and the actual characterization of distributions, and may differ from those shown. &amp;#160;After-tax&#13;returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.&#13;&amp;#160;After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares. &amp;#160;Return&#13;After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions&#13;were made during that period. &amp;#160;Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater&#13;than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.&lt;/p&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableClosingTextBlock contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;These returns reflect the maximum sales charge for Class&#13;A (4.75%) and any applicable contingent deferred sales charge (&amp;#147;CDSC&amp;#148;) for Class B and Class C. &amp;#160;The Class C performance&#13;shown above for the period prior to May 2, 2006 (commencement of operations) is the performance of Class B shares, adjusted for&#13;the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes)&#13;and the Class I performance shown above for the period prior to March 3, 2008 (commencement of operations) is the performance of&#13;Class A shares at net asset value without adjustment for any differences in the expenses of the two classes. &amp;#160;If adjusted&#13;for other expenses, returns would be different. &amp;#160;Investors cannot invest directly in an Index&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;After-tax returns are calculated using the highest historical&#13;individual federal income tax rate and do not reflect the impact of state and local taxes. &amp;#160;Actual after-tax returns depend&#13;on a shareholder&amp;#146;s tax situation and the actual characterization of distributions, and may differ from those shown. &amp;#160;After-tax&#13;returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.&#13;&amp;#160;After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares. &amp;#160;Return&#13;After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions&#13;were made during that period. &amp;#160;Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater&#13;than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.&lt;/p&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableClosingTextBlock contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;These returns reflect the maximum sales charge for Class&#13;A (4.75%) and any applicable contingent deferred sales charge (&amp;#147;CDSC&amp;#148;) for Class B and Class C. &amp;#160;The Class C performance&#13;shown above for the period prior to February 16, 2006 (commencement of operations) is the performance of Class B shares, adjusted&#13;for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes)&#13;and the Class I performance shown above for the period prior to August 3, 2010 (commencement of operations) is the performance&#13;of Class A shares at net asset value without adjustment for any differences in the expenses of the two classes. &amp;#160;If adjusted&#13;for other expenses, returns would be different. &amp;#160;Investors cannot invest directly in an Index. &amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;After-tax returns are calculated using the highest historical&#13;individual federal income tax rate and do not reflect the impact of state and local taxes. &amp;#160;Actual after-tax returns depend&#13;on a shareholder&amp;#146;s tax situation and the actual characterization of distributions, and may differ from those shown. &amp;#160;After-tax&#13;returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.&#13;&amp;#160;After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares. &amp;#160;Return&#13;After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions&#13;were made during that period. &amp;#160;Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater&#13;than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.&lt;/p&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableClosingTextBlock contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;These returns reflect the maximum sales charge for Class&#13;A (4.75%) and any applicable contingent deferred sales charge (&amp;#147;CDSC&amp;#148;) for Class B and Class C. &amp;#160;The Class C performance&#13;shown above for the period prior to May 2, 2006 (commencement of operations) is the performance of Class B shares, adjusted for&#13;the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes)&#13;and the Class I performance shown above for the period prior to March 3, 2008 (commencement of operations) is the performance of&#13;Class A shares at net asset value without adjustment for any differences in the expenses of the two classes. If adjusted for other&#13;expenses, returns would be different. &amp;#160;Investors cannot invest directly in an Index. &amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;After-tax returns are calculated using the highest historical&#13;individual federal income tax rate and do not reflect the impact of state and local taxes. &amp;#160;Actual after-tax returns depend&#13;on a shareholder&amp;#146;s tax situation and the actual characterization of distributions, and may differ from those shown. &amp;#160;After-tax&#13;returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.&#13;&amp;#160;After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares. &amp;#160;Return&#13;After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions&#13;were made during that period. &amp;#160;Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater&#13;than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.&lt;/p&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableClosingTextBlock contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;These returns reflect the maximum sales charge for Class&#13;A (4.75%) and any applicable contingent deferred sales charge (&amp;#147;CDSC&amp;#148;) for Class B and Class C. &amp;#160;The Class C performance&#13;shown above for the period prior to March 2, 2006 (commencement of operations) is the performance of Class B shares, adjusted for&#13;the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes)&#13;and the Class I performance shown above for the period prior to August 3, 2010 (commencement of operations) is the performance&#13;of Class A shares at net asset value without adjustment for any differences in the expenses of the two classes. &amp;#160;If adjusted&#13;for other expenses, returns would be different. &amp;#160;Investors cannot invest directly in an Index. &amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;After-tax returns are calculated using the highest historical&#13;individual federal income tax rate and do not reflect the impact of state and local taxes. &amp;#160;Actual after-tax returns depend&#13;on a shareholder&amp;#146;s tax situation and the actual characterization of distributions, and may differ from those shown. &amp;#160;After-tax&#13;returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.&#13;&amp;#160;After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares. &amp;#160;Return&#13;After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions&#13;were made during that period. &amp;#160;Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater&#13;than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.&lt;/p&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableClosingTextBlock contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;These returns reflect the maximum sales charge for Class&#13;A (4.75%) and any applicable contingent deferred sales charge (&amp;#147;CDSC&amp;#148;) for Class B and Class C. &amp;#160;The Class C performance&#13;shown above for the period prior to January 12, 2006 (commencement of operations) is the performance of Class B shares, adjusted&#13;for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes)&#13;and the Class I performance shown above for the period prior to March 3, 2008 (commencement of operations) is the performance of&#13;Class A shares at net asset value without adjustment for any differences in the expenses of the two classes. &amp;#160;If adjusted&#13;for other expenses, returns would be different. &amp;#160;Investors cannot invest directly in an Index. &amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;After-tax returns are calculated using the highest historical&#13;individual federal income tax rate and do not reflect the impact of state and local taxes. &amp;#160;Actual after-tax returns depend&#13;on a shareholder&amp;#146;s tax situation and the actual characterization of distributions, and may differ from those shown. &amp;#160;After-tax&#13;returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.&#13;&amp;#160;After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares. &amp;#160;Return&#13;After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions&#13;were made during that period. &amp;#160;Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater&#13;than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.&lt;/p&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableClosingTextBlock contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;These returns reflect the maximum sales charge for Class&#13;A (4.75%) and any applicable contingent deferred sales charge (&amp;#147;CDSC&amp;#148;) for Class B and Class C. &amp;#160;The Class C performance&#13;shown above for the period prior to May 2, 2006 (commencement of operations) is the performance of Class B shares, adjusted for&#13;the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes)&#13;and the Class I performance shown above for the period prior to August 3, 2010 (commencement of operations) is the performance&#13;of Class A shares at net asset value without adjustment for any differences in the expenses of the two classes . &amp;#160;If adjusted&#13;for other expenses, returns would be different. &amp;#160;Investors cannot invest directly in an Index.&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;After-tax returns are calculated using the highest historical&#13;individual federal income tax rate and do not reflect the impact of state and local taxes. &amp;#160;Actual after-tax returns depend&#13;on a shareholder&amp;#146;s tax situation and the actual characterization of distributions, and may differ from those shown. &amp;#160;After-tax&#13;returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.&#13;&amp;#160;After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares. &amp;#160;Return&#13;After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions&#13;were made during that period. &amp;#160;Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater&#13;than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.&lt;/p&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableClosingTextBlock contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;These returns reflect the maximum sales charge for Class&#13;A (4.75%) and any applicable contingent deferred sales charge (&amp;#147;CDSC&amp;#148;) for Class B and Class C. &amp;#160;The Class C performance&#13;shown above for the period prior to February 8, 2006 (commencement of operations) is the performance of Class B shares, adjusted&#13;for the sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes)&#13;and the Class I performance shown above for the period prior to March 3, 2008 (commencement of operations) is the performance of&#13;Class A shares at net asset value without adjustment for any differences in the expenses of the two classes. &amp;#160;If adjusted&#13;for other expenses, returns would be different. &amp;#160;Investors cannot invest directly in an Index&lt;/p&gt;&#13;&#13;&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;&amp;#160;After-tax returns are calculated using the highest&#13;historical individual federal income tax rate and do not reflect the impact of state and local taxes. &amp;#160;Actual after-tax returns&#13;depend on a shareholder&amp;#146;s tax situation and the actual characterization of distributions, and may differ from those shown.&#13;&amp;#160;After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable&#13;entities. &amp;#160;After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.&#13;&amp;#160;Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable&#13;distributions were made during that period. &amp;#160;Also, Return After Taxes on Distributions and Sale of Fund Shares for a period&#13;may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale&#13;of Fund shares.&lt;/p&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:ShareholderFeesCaption contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 12pt/12pt NewsGoth Dm BT,Times New Roman; margin-top: 4px; margin-bottom: 4px"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/p&gt;</rr:ShareholderFeesCaption>
    <rr:ShareholderFeesCaption contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 12pt/12pt NewsGoth Dm BT,Times New Roman; margin-top: 4px; margin-bottom: 4px"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/p&gt;</rr:ShareholderFeesCaption>
    <rr:ShareholderFeesCaption contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 12pt/12pt NewsGoth Dm BT,Times New Roman; margin-top: 4px; margin-bottom: 4px"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/p&gt;</rr:ShareholderFeesCaption>
    <rr:ShareholderFeesCaption contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 12pt/12pt NewsGoth Dm BT,Times New Roman; margin-top: 4px; margin-bottom: 4px"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/p&gt;</rr:ShareholderFeesCaption>
    <rr:ShareholderFeesCaption contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 12pt/12pt NewsGoth Dm BT,Times New Roman; margin-top: 4px; margin-bottom: 4px"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/p&gt;</rr:ShareholderFeesCaption>
    <rr:ShareholderFeesCaption contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 12pt/12pt NewsGoth Dm BT,Times New Roman; margin-top: 4px; margin-bottom: 4px"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/p&gt;</rr:ShareholderFeesCaption>
    <rr:ShareholderFeesCaption contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 12pt/12pt NewsGoth Dm BT,Times New Roman; margin-top: 4px; margin-bottom: 4px"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/p&gt;</rr:ShareholderFeesCaption>
    <rr:ShareholderFeesCaption contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 12pt/12pt NewsGoth Dm BT,Times New Roman; margin-top: 4px; margin-bottom: 4px"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/p&gt;</rr:ShareholderFeesCaption>
    <rr:ShareholderFeesCaption contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 12pt/12pt NewsGoth Dm BT,Times New Roman; margin-top: 4px; margin-bottom: 4px"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/p&gt;</rr:ShareholderFeesCaption>
    <rr:ShareholderFeesCaption contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 12pt/12pt NewsGoth Dm BT,Times New Roman; margin-top: 4px; margin-bottom: 4px"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/p&gt;</rr:ShareholderFeesCaption>
    <rr:ShareholderFeesCaption contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 12pt/12pt NewsGoth Dm BT,Times New Roman; margin-top: 4px; margin-bottom: 4px"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/p&gt;</rr:ShareholderFeesCaption>
    <rr:OperatingExpensesCaption contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 12pt/12pt NewsGoth Dm BT,Times New Roman; margin-top: 4px; margin-bottom: 4px"&gt;Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)&lt;/p&gt;</rr:OperatingExpensesCaption>
    <rr:OperatingExpensesCaption contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 12pt/12pt NewsGoth Dm BT,Times New Roman; margin-top: 4px; margin-bottom: 4px"&gt;Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)&lt;/p&gt;</rr:OperatingExpensesCaption>
    <rr:OperatingExpensesCaption contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 12pt/12pt NewsGoth Dm BT,Times New Roman; margin-top: 4px; margin-bottom: 4px"&gt;Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)&lt;/p&gt;</rr:OperatingExpensesCaption>
    <rr:OperatingExpensesCaption contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 12pt/12pt NewsGoth Dm BT,Times New Roman; margin-top: 4px; margin-bottom: 4px"&gt;Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)&lt;/p&gt;</rr:OperatingExpensesCaption>
    <rr:OperatingExpensesCaption contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 12pt/12pt NewsGoth Dm BT,Times New Roman; margin-top: 4px; margin-bottom: 4px"&gt;Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)&lt;/p&gt;</rr:OperatingExpensesCaption>
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    <rr:OtherExpensesOverAssets contextRef="AsOf2012-12-20_S000004857Member_C000013157Member" unitRef="Ratio" decimals="INF">0.0023</rr:OtherExpensesOverAssets>
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    <rr:AverageAnnualReturnYear10 contextRef="AsOf2012-12-20_S000004856Member_C000013155Member" unitRef="Ratio" decimals="INF">0.0280</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear10 contextRef="AsOf2012-12-20_S000004856Member_C000013156Member" unitRef="Ratio" decimals="INF">0.0278</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear10 contextRef="AsOf2012-12-20_S000004856Member_C000092724Member" unitRef="Ratio" decimals="INF">0.0358</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear10 contextRef="AsOf2012-12-20_S000004857Member_BarclaysCapitalMunicipalBondIndexMember" unitRef="Ratio" decimals="INF">0.0537</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear10 contextRef="AsOf2012-12-20_S000004857Member_C000013157Member" unitRef="Ratio" decimals="INF">0.0272</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear10 contextRef="AsOf2012-12-20_S000004857Member_C000013157Member_AfterTaxesOnDistributionsMember" unitRef="Ratio" decimals="INF">0.0271</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear10 contextRef="AsOf2012-12-20_S000004857Member_C000013157Member_AfterTaxesOnDistributionsAndSalesMember" unitRef="Ratio" decimals="INF">0.0297</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear10 contextRef="AsOf2012-12-20_S000004857Member_BarclaysCapital20YearMunicipalBondIndexMember" unitRef="Ratio" decimals="INF">0.0601</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear10 contextRef="AsOf2012-12-20_S000004857Member_C000013158Member" unitRef="Ratio" decimals="INF">0.0247</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear10 contextRef="AsOf2012-12-20_S000004857Member_C000013159Member" unitRef="Ratio" decimals="INF">0.0246</rr:AverageAnnualReturnYear10>
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    <rr:ExpenseBreakpointDiscounts contextRef="AsOf2012-12-20_S000004838Member">You may qualify for a reduced sales charge if you invest, or agree to invest over&#13;a 13-month period, at least $50,000 in Eaton Vance Funds. &amp;#160;More information about these and other discounts is available from&#13;your financial intermediary and in Sales Charges beginning on page 5 5 of this Prospectus and page 19 of the Fund&amp;#146;s Statement&#13;of Additional Information.</rr:ExpenseBreakpointDiscounts>
    <rr:ExpenseBreakpointDiscounts contextRef="AsOf2012-12-20_S000004859Member">You may qualify for a reduced sales charge if you invest, or agree to invest over&#13;a 13-month period, at least $50,000 in Eaton Vance Funds. &amp;#160;More information about these and other discounts is available from&#13;your financial intermediary and in Sales Charges beginning on page 5 5 of this Prospectus and page 19 of the Fund&amp;#146;s Statement&#13;of Additional Information.</rr:ExpenseBreakpointDiscounts>
    <rr:ExpenseBreakpointDiscounts contextRef="AsOf2012-12-20_S000004864Member">You may qualify for a reduced sales charge if you invest, or agree to invest over&#13;a 13-month period, at least $50,000 in Eaton Vance Funds. &amp;#160;More information about these and other discounts is available from&#13;your financial intermediary and in Sales Charges beginning on page 5 5 of this Prospectus and page 19 of the Fund&amp;#146;s Statement&#13;of Additional Information.</rr:ExpenseBreakpointDiscounts>
    <rr:ExpenseBreakpointDiscounts contextRef="AsOf2012-12-20_S000004865Member">You may qualify for a reduced sales charge if you invest, or agree to invest over&#13;a 13-month period, at least $50,000 in Eaton Vance Funds. &amp;#160;More information about these and other discounts is available from&#13;your financial intermediary and in Sales Charges beginning on page 5 5 of this Prospectus and page 19 of the Fund&amp;#146;s Statement&#13;of Additional Information.</rr:ExpenseBreakpointDiscounts>
    <rr:ExpenseBreakpointDiscounts contextRef="AsOf2012-12-20_S000004840Member">You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in&#13;Eaton Vance Funds. &amp;#160;More information about these and other discounts is available from your financial intermediary and&#13;in Sales Charges beginning on page 5 5 of this Prospectus and page  20 of the Fund&amp;#146;s Statement of Additional&#13;Information.</rr:ExpenseBreakpointDiscounts>
    <rr:ExpenseBreakpointDiscounts contextRef="AsOf2012-12-20_S000004845Member">You may qualify for a reduced sales charge if you invest, or agree to invest over&#13;a 13-month period, at least $50,000 in Eaton Vance Funds. &amp;#160;More information about these and other discounts is available from&#13;your financial intermediary and in Sales Charges beginning on page 5 5 of this Prospectus and page 19 of the Fund&amp;#146;s Statement&#13;of Additional Information.</rr:ExpenseBreakpointDiscounts>
    <rr:ExpenseBreakpointDiscounts contextRef="AsOf2012-12-20_S000004850Member">You may qualify for a reduced sales charge if you invest, or agree to invest over&#13;a 13-month period, at least $50,000 in Eaton Vance Funds. &amp;#160;More information about these and other discounts is available from&#13;your financial intermediary and in Sales Charges beginning on page 5 5 of this Prospectus and page 19 of the Fund&amp;#146;s Statement&#13;of Additional Information.</rr:ExpenseBreakpointDiscounts>
    <rr:ExpenseBreakpointDiscounts contextRef="AsOf2012-12-20_S000004852Member">You may qualify for a reduced sales charge if you invest, or agree to invest over&#13;a 13-month period, at least $50,000 in Eaton Vance Funds. &amp;#160;More information about these and other discounts is available from&#13;your financial intermediary and in Sales Charges beginning on page 5 5 of this Prospectus and page 19 of the Fund&amp;#146;s Statement&#13;of Additional Information.</rr:ExpenseBreakpointDiscounts>
    <rr:ExpenseBreakpointDiscounts contextRef="AsOf2012-12-20_S000004855Member">You may qualify for a reduced sales charge if you invest, or agree to invest over&#13;a 13-month period, at least $50,000 in Eaton Vance Funds. &amp;#160;More information about these and other discounts is available from&#13;your financial intermediary and in Sales Charges beginning on page 5 5 of this Prospectus and page 19 of the Fund&amp;#146;s Statement&#13;of Additional Information.</rr:ExpenseBreakpointDiscounts>
    <rr:ExpenseBreakpointDiscounts contextRef="AsOf2012-12-20_S000004856Member">You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in&#13;Eaton Vance Funds. &amp;#160;More information about these and other discounts is available from your financial intermediary and&#13;in Sales Charges beginning on page 56  of this Prospectus and page  20 of the Fund&amp;#146;s Statement of Additional&#13;Information.</rr:ExpenseBreakpointDiscounts>
    <rr:ExpenseBreakpointDiscounts contextRef="AsOf2012-12-20_S000004857Member">You may qualify for a reduced sales charge if you invest, or agree to invest over&#13;a 13-month period, at least $50,000 in Eaton Vance Funds. &amp;#160;More information about these and other discounts is available from&#13;your financial intermediary and in Sales Charges beginning on page 5 5 of this Prospectus and page 19 of the Fund&amp;#146;s Statement&#13;of Additional Information.</rr:ExpenseBreakpointDiscounts>
    <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount contextRef="AsOf2012-12-20_S000004838Member" unitRef="USD" decimals="0">50000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
    <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount contextRef="AsOf2012-12-20_S000004859Member" unitRef="USD" decimals="0">50000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
    <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount contextRef="AsOf2012-12-20_S000004864Member" unitRef="USD" decimals="0">50000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
    <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount contextRef="AsOf2012-12-20_S000004865Member" unitRef="USD" decimals="0">50000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
    <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount contextRef="AsOf2012-12-20_S000004840Member" unitRef="USD" decimals="0">50000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
    <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount contextRef="AsOf2012-12-20_S000004845Member" unitRef="USD" decimals="0">50000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
    <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount contextRef="AsOf2012-12-20_S000004850Member" unitRef="USD" decimals="0">50000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
    <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount contextRef="AsOf2012-12-20_S000004852Member" unitRef="USD" decimals="0">50000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
    <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount contextRef="AsOf2012-12-20_S000004855Member" unitRef="USD" decimals="0">50000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
    <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount contextRef="AsOf2012-12-20_S000004856Member" unitRef="USD" decimals="0">50000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
    <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount contextRef="AsOf2012-12-20_S000004857Member" unitRef="USD" decimals="0">50000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
    <rr:PortfolioTurnoverRate contextRef="AsOf2012-12-20_S000004838Member" unitRef="Ratio" decimals="INF">0.11</rr:PortfolioTurnoverRate>
    <rr:PortfolioTurnoverRate contextRef="AsOf2012-12-20_S000004859Member" unitRef="Ratio" decimals="INF">0.10</rr:PortfolioTurnoverRate>
    <rr:PortfolioTurnoverRate contextRef="AsOf2012-12-20_S000004864Member" unitRef="Ratio" decimals="INF">0.12</rr:PortfolioTurnoverRate>
    <rr:PortfolioTurnoverRate contextRef="AsOf2012-12-20_S000004865Member" unitRef="Ratio" decimals="INF">0.12</rr:PortfolioTurnoverRate>
    <rr:PortfolioTurnoverRate contextRef="AsOf2012-12-20_S000004840Member" unitRef="Ratio" decimals="INF">0.12</rr:PortfolioTurnoverRate>
    <rr:PortfolioTurnoverRate contextRef="AsOf2012-12-20_S000004845Member" unitRef="Ratio" decimals="INF">0.12</rr:PortfolioTurnoverRate>
    <rr:PortfolioTurnoverRate contextRef="AsOf2012-12-20_S000004850Member" unitRef="Ratio" decimals="INF">0.08</rr:PortfolioTurnoverRate>
    <rr:PortfolioTurnoverRate contextRef="AsOf2012-12-20_S000004852Member" unitRef="Ratio" decimals="INF">0.17</rr:PortfolioTurnoverRate>
    <rr:PortfolioTurnoverRate contextRef="AsOf2012-12-20_S000004855Member" unitRef="Ratio" decimals="INF">0.30</rr:PortfolioTurnoverRate>
    <rr:PortfolioTurnoverRate contextRef="AsOf2012-12-20_S000004856Member" unitRef="Ratio" decimals="INF">0.09</rr:PortfolioTurnoverRate>
    <rr:PortfolioTurnoverRate contextRef="AsOf2012-12-20_S000004857Member" unitRef="Ratio" decimals="INF">0.09</rr:PortfolioTurnoverRate>
    <rr:StrategyPortfolioConcentration contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;interest from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions , if securities are rated differently by the rating agencies&#13;, the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;</rr:StrategyPortfolioConcentration>
    <rr:StrategyPortfolioConcentration contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions, if securities are rated differently by the rating agencies,&#13;the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;</rr:StrategyPortfolioConcentration>
    <rr:StrategyPortfolioConcentration contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions, if securities are rated differently by the rating agencies,&#13;the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;</rr:StrategyPortfolioConcentration>
    <rr:StrategyPortfolioConcentration contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions, if securities are rated differently by the rating agencies,&#13;the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;</rr:StrategyPortfolioConcentration>
    <rr:StrategyPortfolioConcentration contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions, if securities are rated differently by the rating agencies,&#13;the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;</rr:StrategyPortfolioConcentration>
    <rr:StrategyPortfolioConcentration contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions, if securities are rated differently by the rating agencies,&#13;the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;</rr:StrategyPortfolioConcentration>
    <rr:StrategyPortfolioConcentration contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions, if securities are rated differently by the rating agencies,&#13;the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;</rr:StrategyPortfolioConcentration>
    <rr:StrategyPortfolioConcentration contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions , if securities are rated differently by the rating agencies&#13;, the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;</rr:StrategyPortfolioConcentration>
    <rr:StrategyPortfolioConcentration contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions, if securities are rated differently by the rating agencies,&#13;the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;</rr:StrategyPortfolioConcentration>
    <rr:StrategyPortfolioConcentration contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality. The balance of net assets may be invested in municipal obligations rated below investment grade and in unrated municipal&#13;obligations considered to be of comparable quality by the investment adviser (&amp;#147;junk bonds&amp;#148;). The Fund will not invest&#13;more than 10% of its net assets in obligations rated below B or in unrated obligations considered to be of comparable quality by&#13;the investment adviser. &amp;#160;For purposes of rating restrictions , if securities are rated differently by the rating agencies&#13;, the higher rating is used. &amp;#160;Under normal market conditions, the Fund invests at least 65% of its total assets in obligations&#13;issued by its state or its political subdivisions, agencies, authorities and instrumentalities. &amp;#160;If consistent with relevant&#13;state tax requirements, the Fund may invest up to 35% of its net assets in municipal obligations issued by the governments of Puerto&#13;Rico, the U.S. Virgin Islands and Guam. &amp;#160;The Fund is &amp;#147;non-diversified&amp;#148; and may invest, with respect to 50% of&#13;its total assets, more than 5% (but not more than 25%) of its total assets in securities of any one issuer (such limitations do&#13;not apply to U.S. Government securities). &amp;#160;The Fund may purchase or sell derivative instruments (such as residual interest&#13;bonds, futures contracts and options thereon, interest rate swaps, and forward rate contracts) for hedging purposes, to seek total&#13;return or as a substitute for the purchase or sale of securities.&lt;/p&gt;</rr:StrategyPortfolioConcentration>
    <rr:StrategyPortfolioConcentration contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Under normal market circumstances, the Fund invests at least&#13;80% of its net assets in municipal obligations that are exempt from regular federal income tax and the state taxes specified in&#13;the Fund&amp;#146;s investment objective (the &amp;#147;80% Policy&amp;#148;). &amp;#160;The Fund may invest without limit in obligations the&#13;income from which is subject to the federal alternative minimum tax. &amp;#160;At least 75% of net assets normally will be invested&#13;in municipal obligations rated at least investment grade at the time of investment (which are those rated Baa or higher by Moody&amp;#146;s&#13;Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;), or BBB or higher by either Standard &amp;#38; Poor&amp;#146;s Ratings Group (&amp;#147;S&amp;#38;P&amp;#148;)&#13;or Fitch Ratings (&amp;#147;Fitch&amp;#148;)) or, if unrated, determined by the investment adviser to be of at least investment grade&#13;quality.&lt;/p&gt;</rr:StrategyPortfolioConcentration>
    <rr:RiskLoseMoney contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &lt;/p&gt;</rr:RiskLoseMoney>
    <rr:RiskLoseMoney contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &lt;/p&gt;</rr:RiskLoseMoney>
    <rr:RiskLoseMoney contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &lt;/p&gt;</rr:RiskLoseMoney>
    <rr:RiskLoseMoney contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &lt;/p&gt;</rr:RiskLoseMoney>
    <rr:RiskLoseMoney contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &lt;/p&gt;</rr:RiskLoseMoney>
    <rr:RiskLoseMoney contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &lt;/p&gt;</rr:RiskLoseMoney>
    <rr:RiskLoseMoney contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &lt;/p&gt;</rr:RiskLoseMoney>
    <rr:RiskLoseMoney contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &lt;/p&gt;</rr:RiskLoseMoney>
    <rr:RiskLoseMoney contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &lt;/p&gt;</rr:RiskLoseMoney>
    <rr:RiskLoseMoney contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &lt;/p&gt;</rr:RiskLoseMoney>
    <rr:RiskLoseMoney contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt;The Fund is not a complete&#13;investment program and you may lose money by investing in the Fund. &lt;/p&gt;</rr:RiskLoseMoney>
    <rr:RiskNotInsuredDepositoryInstitution contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt; An investment&#13;in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other&#13;government agency, entity or person. &lt;/p&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:RiskNotInsuredDepositoryInstitution contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt; An investment&#13;in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other&#13;government agency, entity or person. &lt;/p&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:RiskNotInsuredDepositoryInstitution contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt; An investment&#13;in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other&#13;government agency, entity or person. &lt;/p&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:RiskNotInsuredDepositoryInstitution contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt; An investment&#13;in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other&#13;government agency, entity or person. &lt;/p&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:RiskNotInsuredDepositoryInstitution contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt; An investment&#13;in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other&#13;government agency, entity or person. &lt;/p&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:RiskNotInsuredDepositoryInstitution contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt; An investment&#13;in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other&#13;government agency, entity or person. &lt;/p&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:RiskNotInsuredDepositoryInstitution contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt; An investment&#13;in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other&#13;government agency, entity or person. &lt;/p&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:RiskNotInsuredDepositoryInstitution contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt; An investment&#13;in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other&#13;government agency, entity or person. &lt;/p&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:RiskNotInsuredDepositoryInstitution contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt; An investment&#13;in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other&#13;government agency, entity or person. &lt;/p&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:RiskNotInsuredDepositoryInstitution contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt; An investment&#13;in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other&#13;government agency, entity or person. &lt;/p&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:RiskNotInsuredDepositoryInstitution contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 10pt/12pt Times New Roman, Times, Serif; margin: 3pt 0"&gt; An investment&#13;in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other&#13;government agency, entity or person. &lt;/p&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &lt;/p&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &lt;/p&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &lt;/p&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &lt;/p&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &lt;/p&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &lt;/p&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &lt;/p&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &lt;/p&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &lt;/p&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &lt;/p&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;The following bar chart and table provide some indication&#13;of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year and how the Fund&amp;#146;s&#13;average annual returns over time compare with those of two broad-based securities market indices. &lt;/p&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress contextRef="AsOf2012-12-20_S000004838Member">www.eatonvance.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityWebSiteAddress contextRef="AsOf2012-12-20_S000004859Member">www.eatonvance.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityWebSiteAddress contextRef="AsOf2012-12-20_S000004864Member">www.eatonvance.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityWebSiteAddress contextRef="AsOf2012-12-20_S000004865Member">www.eatonvance.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityWebSiteAddress contextRef="AsOf2012-12-20_S000004840Member">www.eatonvance.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityWebSiteAddress contextRef="AsOf2012-12-20_S000004845Member">www.eatonvance.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityWebSiteAddress contextRef="AsOf2012-12-20_S000004850Member">www.eatonvance.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityWebSiteAddress contextRef="AsOf2012-12-20_S000004852Member">www.eatonvance.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityWebSiteAddress contextRef="AsOf2012-12-20_S000004855Member">www.eatonvance.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityWebSiteAddress contextRef="AsOf2012-12-20_S000004856Member">www.eatonvance.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityWebSiteAddress contextRef="AsOf2012-12-20_S000004857Member">www.eatonvance.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture contextRef="AsOf2012-12-20_S000004838Member">Past performance (both before and after taxes) is no guarantee of future results.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformancePastDoesNotIndicateFuture contextRef="AsOf2012-12-20_S000004859Member">Past performance (both before and after taxes) is no guarantee of future results.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformancePastDoesNotIndicateFuture contextRef="AsOf2012-12-20_S000004864Member">Past performance (both before and after taxes) is no guarantee of future results.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformancePastDoesNotIndicateFuture contextRef="AsOf2012-12-20_S000004865Member">Past performance (both before and after taxes) is no guarantee of future results.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformancePastDoesNotIndicateFuture contextRef="AsOf2012-12-20_S000004840Member">Past performance (both before and after taxes) is no guarantee of future results.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformancePastDoesNotIndicateFuture contextRef="AsOf2012-12-20_S000004845Member">Past performance (both before and after taxes) is no guarantee of future results.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformancePastDoesNotIndicateFuture contextRef="AsOf2012-12-20_S000004850Member">Past performance (both before and after taxes) is no guarantee of future results.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformancePastDoesNotIndicateFuture contextRef="AsOf2012-12-20_S000004852Member">Past performance (both before and after taxes) is no guarantee of future results.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformancePastDoesNotIndicateFuture contextRef="AsOf2012-12-20_S000004855Member">Past performance (both before and after taxes) is no guarantee of future results.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformancePastDoesNotIndicateFuture contextRef="AsOf2012-12-20_S000004856Member">Past performance (both before and after taxes) is no guarantee of future results.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformancePastDoesNotIndicateFuture contextRef="AsOf2012-12-20_S000004857Member">Past performance (both before and after taxes) is no guarantee of future results.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartDoesNotReflectSalesLoads contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;&amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&lt;/p&gt;</rr:BarChartDoesNotReflectSalesLoads>
    <rr:BarChartDoesNotReflectSalesLoads contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;&amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&lt;/p&gt;</rr:BarChartDoesNotReflectSalesLoads>
    <rr:BarChartDoesNotReflectSalesLoads contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;&amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&lt;/p&gt;</rr:BarChartDoesNotReflectSalesLoads>
    <rr:BarChartDoesNotReflectSalesLoads contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;&amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&lt;/p&gt;</rr:BarChartDoesNotReflectSalesLoads>
    <rr:BarChartDoesNotReflectSalesLoads contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;&amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&lt;/p&gt;</rr:BarChartDoesNotReflectSalesLoads>
    <rr:BarChartDoesNotReflectSalesLoads contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;&amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&lt;/p&gt;</rr:BarChartDoesNotReflectSalesLoads>
    <rr:BarChartDoesNotReflectSalesLoads contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;&amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&lt;/p&gt;</rr:BarChartDoesNotReflectSalesLoads>
    <rr:BarChartDoesNotReflectSalesLoads contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;&amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&lt;/p&gt;</rr:BarChartDoesNotReflectSalesLoads>
    <rr:BarChartDoesNotReflectSalesLoads contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;&amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&lt;/p&gt;</rr:BarChartDoesNotReflectSalesLoads>
    <rr:BarChartDoesNotReflectSalesLoads contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;&amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&lt;/p&gt;</rr:BarChartDoesNotReflectSalesLoads>
    <rr:BarChartDoesNotReflectSalesLoads contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;&amp;#160;The returns in the bar&#13;chart are for Class A shares and do not reflect a sales charge. &amp;#160;If the sales charge was reflected, the returns would be lower.&#13;&lt;/p&gt;</rr:BarChartDoesNotReflectSalesLoads>
    <rr:HighestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was&lt;/p&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:HighestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was&lt;/p&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:HighestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was&lt;/p&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:HighestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was&lt;/p&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:HighestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was&lt;/p&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:HighestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was&lt;/p&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:HighestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was&lt;/p&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:HighestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was&lt;/p&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:HighestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was&lt;/p&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:HighestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was&lt;/p&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:HighestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;During the ten years ended December 31, 2011 , the highest&#13;quarterly total return for Class A was&lt;/p&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004838Member">2009-09-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004859Member">2009-03-31</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004864Member">2009-03-31</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004865Member">2009-09-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004840Member">2009-09-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004845Member">2009-09-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004850Member">2009-09-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004852Member">2009-09-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004855Member">2009-09-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004856Member">2009-03-31</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004857Member">2009-03-31</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn contextRef="AsOf2012-12-20_S000004838Member" unitRef="Ratio" decimals="INF">0.0960</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturn contextRef="AsOf2012-12-20_S000004859Member" unitRef="Ratio" decimals="INF">0.1073</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturn contextRef="AsOf2012-12-20_S000004864Member" unitRef="Ratio" decimals="INF">0.1021</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturn contextRef="AsOf2012-12-20_S000004865Member" unitRef="Ratio" decimals="INF">0.0837</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturn contextRef="AsOf2012-12-20_S000004840Member" unitRef="Ratio" decimals="INF">0.0993</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturn contextRef="AsOf2012-12-20_S000004845Member" unitRef="Ratio" decimals="INF">0.0950</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturn contextRef="AsOf2012-12-20_S000004850Member" unitRef="Ratio" decimals="INF">-0.0761</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturn contextRef="AsOf2012-12-20_S000004852Member" unitRef="Ratio" decimals="INF">0.1243</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturn contextRef="AsOf2012-12-20_S000004855Member" unitRef="Ratio" decimals="INF">0.1211</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturn contextRef="AsOf2012-12-20_S000004856Member" unitRef="Ratio" decimals="INF">0.0848</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturn contextRef="AsOf2012-12-20_S000004857Member" unitRef="Ratio" decimals="INF">0.1252</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004838Member">2008-09-30</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004859Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004864Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004865Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004840Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004845Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004850Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004852Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004855Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004856Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturnDate contextRef="AsOf2012-12-20_S000004857Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn contextRef="AsOf2012-12-20_S000004838Member" unitRef="Ratio" decimals="INF">-0.0569</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturn contextRef="AsOf2012-12-20_S000004859Member" unitRef="Ratio" decimals="INF">-0.1090</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturn contextRef="AsOf2012-12-20_S000004864Member" unitRef="Ratio" decimals="INF">-0.1024</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturn contextRef="AsOf2012-12-20_S000004865Member" unitRef="Ratio" decimals="INF">-0.0637</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturn contextRef="AsOf2012-12-20_S000004840Member" unitRef="Ratio" decimals="INF">-0.0986</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturn contextRef="AsOf2012-12-20_S000004845Member" unitRef="Ratio" decimals="INF">-0.0676</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturn contextRef="AsOf2012-12-20_S000004850Member" unitRef="Ratio" decimals="INF">-0.0761</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturn contextRef="AsOf2012-12-20_S000004852Member" unitRef="Ratio" decimals="INF">-0.0974</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturn contextRef="AsOf2012-12-20_S000004855Member" unitRef="Ratio" decimals="INF">-0.0983</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturn contextRef="AsOf2012-12-20_S000004856Member" unitRef="Ratio" decimals="INF">-0.1079</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturn contextRef="AsOf2012-12-20_S000004857Member" unitRef="Ratio" decimals="INF">-0.1467</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartYearToDateReturnDate contextRef="AsOf2012-12-20_S000004838Member">2011-12-31</rr:BarChartYearToDateReturnDate>
    <rr:BarChartYearToDateReturnDate contextRef="AsOf2012-12-20_S000004859Member">2011-12-31</rr:BarChartYearToDateReturnDate>
    <rr:BarChartYearToDateReturnDate contextRef="AsOf2012-12-20_S000004864Member">2011-12-31</rr:BarChartYearToDateReturnDate>
    <rr:BarChartYearToDateReturnDate contextRef="AsOf2012-12-20_S000004865Member">2011-12-31</rr:BarChartYearToDateReturnDate>
    <rr:BarChartYearToDateReturnDate contextRef="AsOf2012-12-20_S000004840Member">2011-12-31</rr:BarChartYearToDateReturnDate>
    <rr:BarChartYearToDateReturnDate contextRef="AsOf2012-12-20_S000004845Member">2011-12-31</rr:BarChartYearToDateReturnDate>
    <rr:BarChartYearToDateReturnDate contextRef="AsOf2012-12-20_S000004850Member">2011-12-31</rr:BarChartYearToDateReturnDate>
    <rr:BarChartYearToDateReturnDate contextRef="AsOf2012-12-20_S000004852Member">2011-12-31</rr:BarChartYearToDateReturnDate>
    <rr:BarChartYearToDateReturnDate contextRef="AsOf2012-12-20_S000004855Member">2011-12-31</rr:BarChartYearToDateReturnDate>
    <rr:BarChartYearToDateReturnDate contextRef="AsOf2012-12-20_S000004856Member">2011-12-31</rr:BarChartYearToDateReturnDate>
    <rr:BarChartYearToDateReturnDate contextRef="AsOf2012-12-20_S000004857Member">2011-12-31</rr:BarChartYearToDateReturnDate>
    <rr:BarChartYearToDateReturn contextRef="AsOf2012-12-20_S000004838Member" unitRef="Ratio" decimals="INF">0.0699</rr:BarChartYearToDateReturn>
    <rr:BarChartYearToDateReturn contextRef="AsOf2012-12-20_S000004859Member" unitRef="Ratio" decimals="INF">0.0559</rr:BarChartYearToDateReturn>
    <rr:BarChartYearToDateReturn contextRef="AsOf2012-12-20_S000004864Member" unitRef="Ratio" decimals="INF">0.0789</rr:BarChartYearToDateReturn>
    <rr:BarChartYearToDateReturn contextRef="AsOf2012-12-20_S000004865Member" unitRef="Ratio" decimals="INF">0.0669</rr:BarChartYearToDateReturn>
    <rr:BarChartYearToDateReturn contextRef="AsOf2012-12-20_S000004840Member" unitRef="Ratio" decimals="INF">0.0719</rr:BarChartYearToDateReturn>
    <rr:BarChartYearToDateReturn contextRef="AsOf2012-12-20_S000004845Member" unitRef="Ratio" decimals="INF">0.0756</rr:BarChartYearToDateReturn>
    <rr:BarChartYearToDateReturn contextRef="AsOf2012-12-20_S000004850Member" unitRef="Ratio" decimals="INF">0.0901</rr:BarChartYearToDateReturn>
    <rr:BarChartYearToDateReturn contextRef="AsOf2012-12-20_S000004852Member" unitRef="Ratio" decimals="INF">0.1108</rr:BarChartYearToDateReturn>
    <rr:BarChartYearToDateReturn contextRef="AsOf2012-12-20_S000004855Member" unitRef="Ratio" decimals="INF">0.0957</rr:BarChartYearToDateReturn>
    <rr:BarChartYearToDateReturn contextRef="AsOf2012-12-20_S000004856Member" unitRef="Ratio" decimals="INF">0.0679</rr:BarChartYearToDateReturn>
    <rr:BarChartYearToDateReturn contextRef="AsOf2012-12-20_S000004857Member" unitRef="Ratio" decimals="INF">0.0752</rr:BarChartYearToDateReturn>
    <rr:ThirtyDayYieldPhone contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;For current yield&#13;information call 1-800-262-1122.&lt;/p&gt;</rr:ThirtyDayYieldPhone>
    <rr:ThirtyDayYieldPhone contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;For current yield&#13;information call 1-800-262-1122.&lt;/p&gt;</rr:ThirtyDayYieldPhone>
    <rr:ThirtyDayYieldPhone contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;For current yield&#13;information call 1-800-262-1122.&lt;/p&gt;</rr:ThirtyDayYieldPhone>
    <rr:ThirtyDayYieldPhone contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;For current yield&#13;information call 1-800-262-1122.&lt;/p&gt;</rr:ThirtyDayYieldPhone>
    <rr:ThirtyDayYieldPhone contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;For current yield&#13;information call 1-800-262-1122.&lt;/p&gt;</rr:ThirtyDayYieldPhone>
    <rr:ThirtyDayYieldPhone contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;For current yield&#13;information call 1-800-262-1122.&lt;/p&gt;</rr:ThirtyDayYieldPhone>
    <rr:ThirtyDayYieldPhone contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;For current yield&#13;information call 1-800-262-1122.&lt;/p&gt;</rr:ThirtyDayYieldPhone>
    <rr:ThirtyDayYieldPhone contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;For current yield&#13;information call 1-800-262-1122.&lt;/p&gt;</rr:ThirtyDayYieldPhone>
    <rr:ThirtyDayYieldPhone contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;For current yield&#13;information call 1-800-262-1122.&lt;/p&gt;</rr:ThirtyDayYieldPhone>
    <rr:ThirtyDayYieldPhone contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;For current yield&#13;information call 1-800-262-1122.&lt;/p&gt;</rr:ThirtyDayYieldPhone>
    <rr:ThirtyDayYieldPhone contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;For current yield&#13;information call 1-800-262-1122.&lt;/p&gt;</rr:ThirtyDayYieldPhone>
    <rr:PerformanceTableUsesHighestFederalRate contextRef="AsOf2012-12-20_S000004838Member">After-tax returns are calculated using the highest historical individual federal &#13;income tax rates and do not reflect the impact of state and local taxes. Actual &#13;after-tax returns depend on a shareholder's tax situation and the actual &#13;characterization of distributions, and may differ from those shown.</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableUsesHighestFederalRate contextRef="AsOf2012-12-20_S000004859Member">After-tax returns are calculated using the highest historical individual federal &#13;income tax rates and do not reflect the impact of state and local taxes. Actual &#13;after-tax returns depend on a shareholder's tax situation and the actual &#13;characterization of distributions, and may differ from those shown.</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableUsesHighestFederalRate contextRef="AsOf2012-12-20_S000004864Member">After-tax returns are calculated using the highest historical individual federal &#13;income tax rates and do not reflect the impact of state and local taxes. Actual &#13;after-tax returns depend on a shareholder's tax situation and the actual &#13;characterization of distributions, and may differ from those shown.</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableUsesHighestFederalRate contextRef="AsOf2012-12-20_S000004865Member">After-tax returns are calculated using the highest historical individual federal &#13;income tax rates and do not reflect the impact of state and local taxes. Actual &#13;after-tax returns depend on a shareholder's tax situation and the actual &#13;characterization of distributions, and may differ from those shown.</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableUsesHighestFederalRate contextRef="AsOf2012-12-20_S000004840Member">After-tax returns are calculated using the highest historical individual federal &#13;income tax rates and do not reflect the impact of state and local taxes. Actual &#13;after-tax returns depend on a shareholder's tax situation and the actual &#13;characterization of distributions, and may differ from those shown.</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableUsesHighestFederalRate contextRef="AsOf2012-12-20_S000004845Member">After-tax returns are calculated using the highest historical individual federal &#13;income tax rates and do not reflect the impact of state and local taxes. Actual &#13;after-tax returns depend on a shareholder's tax situation and the actual &#13;characterization of distributions, and may differ from those shown.</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableUsesHighestFederalRate contextRef="AsOf2012-12-20_S000004850Member">After-tax returns are calculated using the highest historical individual federal &#13;income tax rates and do not reflect the impact of state and local taxes. Actual &#13;after-tax returns depend on a shareholder's tax situation and the actual &#13;characterization of distributions, and may differ from those shown.</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableUsesHighestFederalRate contextRef="AsOf2012-12-20_S000004852Member">After-tax returns are calculated using the highest historical individual federal &#13;income tax rates and do not reflect the impact of state and local taxes. Actual &#13;after-tax returns depend on a shareholder's tax situation and the actual &#13;characterization of distributions, and may differ from those shown.</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableUsesHighestFederalRate contextRef="AsOf2012-12-20_S000004855Member">After-tax returns are calculated using the highest historical individual federal &#13;income tax rates and do not reflect the impact of state and local taxes. Actual &#13;after-tax returns depend on a shareholder's tax situation and the actual &#13;characterization of distributions, and may differ from those shown.</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableUsesHighestFederalRate contextRef="AsOf2012-12-20_S000004856Member">After-tax returns are calculated using the highest historical individual federal &#13;income tax rates and do not reflect the impact of state and local taxes. Actual &#13;after-tax returns depend on a shareholder's tax situation and the actual &#13;characterization of distributions, and may differ from those shown.</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableUsesHighestFederalRate contextRef="AsOf2012-12-20_S000004857Member">After-tax returns are calculated using the highest historical individual federal &#13;income tax rates and do not reflect the impact of state and local taxes. Actual &#13;after-tax returns depend on a shareholder's tax situation and the actual &#13;characterization of distributions, and may differ from those shown.</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="AsOf2012-12-20_S000004838Member">After-tax returns are not relevant to shareholders who hold shares in &#13;tax-deferred accounts or to shares held by non-taxable entities.</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="AsOf2012-12-20_S000004859Member">After-tax returns are not relevant to shareholders who hold shares in &#13;tax-deferred accounts or to shares held by non-taxable entities.</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="AsOf2012-12-20_S000004864Member">After-tax returns are not relevant to shareholders who hold shares in &#13;tax-deferred accounts or to shares held by non-taxable entities.</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="AsOf2012-12-20_S000004865Member">After-tax returns are not relevant to shareholders who hold shares in &#13;tax-deferred accounts or to shares held by non-taxable entities.</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="AsOf2012-12-20_S000004840Member">After-tax returns are not relevant to shareholders who hold shares in &#13;tax-deferred accounts or to shares held by non-taxable entities.</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="AsOf2012-12-20_S000004845Member">After-tax returns are not relevant to shareholders who hold shares in &#13;tax-deferred accounts or to shares held by non-taxable entities.</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="AsOf2012-12-20_S000004850Member">After-tax returns are not relevant to shareholders who hold shares in &#13;tax-deferred accounts or to shares held by non-taxable entities.</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="AsOf2012-12-20_S000004852Member">After-tax returns are not relevant to shareholders who hold shares in &#13;tax-deferred accounts or to shares held by non-taxable entities.</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="AsOf2012-12-20_S000004855Member">After-tax returns are not relevant to shareholders who hold shares in &#13;tax-deferred accounts or to shares held by non-taxable entities.</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="AsOf2012-12-20_S000004856Member">After-tax returns are not relevant to shareholders who hold shares in &#13;tax-deferred accounts or to shares held by non-taxable entities.</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="AsOf2012-12-20_S000004857Member">After-tax returns are not relevant to shareholders who hold shares in &#13;tax-deferred accounts or to shares held by non-taxable entities.</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="AsOf2012-12-20_S000004838Member">After-tax returns for   other Classes of shares will vary from the after-tax returns &#13;presented for Class A shares.</rr:PerformanceTableOneClassOfAfterTaxShown>
    <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="AsOf2012-12-20_S000004859Member">After-tax returns for   other Classes of shares will vary from the after-tax returns &#13;presented for Class A shares.</rr:PerformanceTableOneClassOfAfterTaxShown>
    <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="AsOf2012-12-20_S000004864Member">After-tax returns for   other Classes of shares will vary from the after-tax returns &#13;presented for Class A shares.</rr:PerformanceTableOneClassOfAfterTaxShown>
    <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="AsOf2012-12-20_S000004865Member">After-tax returns for   other Classes of shares will vary from the after-tax returns &#13;presented for Class A shares.</rr:PerformanceTableOneClassOfAfterTaxShown>
    <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="AsOf2012-12-20_S000004840Member">After-tax returns for   other Classes of shares will vary from the after-tax returns &#13;presented for Class A shares.</rr:PerformanceTableOneClassOfAfterTaxShown>
    <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="AsOf2012-12-20_S000004845Member">After-tax returns for   other Classes of shares will vary from the after-tax returns &#13;presented for Class A shares.</rr:PerformanceTableOneClassOfAfterTaxShown>
    <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="AsOf2012-12-20_S000004850Member">After-tax returns for   other Classes of shares will vary from the after-tax returns &#13;presented for Class A shares.</rr:PerformanceTableOneClassOfAfterTaxShown>
    <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="AsOf2012-12-20_S000004852Member">After-tax returns for   other Classes of shares will vary from the after-tax returns &#13;presented for Class A shares.</rr:PerformanceTableOneClassOfAfterTaxShown>
    <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="AsOf2012-12-20_S000004855Member">After-tax returns for   other Classes of shares will vary from the after-tax returns &#13;presented for Class A shares.</rr:PerformanceTableOneClassOfAfterTaxShown>
    <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="AsOf2012-12-20_S000004856Member">After-tax returns for   other Classes of shares will vary from the after-tax returns &#13;presented for Class A shares.</rr:PerformanceTableOneClassOfAfterTaxShown>
    <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="AsOf2012-12-20_S000004857Member">After-tax returns for   other Classes of shares will vary from the after-tax returns &#13;presented for Class A shares.</rr:PerformanceTableOneClassOfAfterTaxShown>
    <rr:PerformanceTableExplanationAfterTaxHigher contextRef="AsOf2012-12-20_S000004838Member">Return After Taxes on Distributions for a period may be the same as Return &#13;Before Taxes for a period because no taxable distributions were made during that &#13;period. Also, Return After Taxes on Distributions and Sale of Fund Shares for a &#13;period may be greater than or equal to Return After Taxes on Distributions for &#13;the same period because of losses realized on the sale of Fund shares.</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:PerformanceTableExplanationAfterTaxHigher contextRef="AsOf2012-12-20_S000004859Member">Return After Taxes on Distributions for a period may be the same as Return &#13;Before Taxes for a period because no taxable distributions were made during that &#13;period. Also, Return After Taxes on Distributions and Sale of Fund Shares for a &#13;period may be greater than or equal to Return After Taxes on Distributions for &#13;the same period because of losses realized on the sale of Fund shares.</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:PerformanceTableExplanationAfterTaxHigher contextRef="AsOf2012-12-20_S000004864Member">Return After Taxes on Distributions for a period may be the same as Return &#13;Before Taxes for a period because no taxable distributions were made during that &#13;period. Also, Return After Taxes on Distributions and Sale of Fund Shares for a &#13;period may be greater than or equal to Return After Taxes on Distributions for &#13;the same period because of losses realized on the sale of Fund shares.</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:PerformanceTableExplanationAfterTaxHigher contextRef="AsOf2012-12-20_S000004865Member">Return After Taxes on Distributions for a period may be the same as Return &#13;Before Taxes for a period because no taxable distributions were made during that &#13;period. Also, Return After Taxes on Distributions and Sale of Fund Shares for a &#13;period may be greater than or equal to Return After Taxes on Distributions for &#13;the same period because of losses realized on the sale of Fund shares.</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:PerformanceTableExplanationAfterTaxHigher contextRef="AsOf2012-12-20_S000004840Member">Return After Taxes on Distributions for a period may be the same as Return &#13;Before Taxes for a period because no taxable distributions were made during that &#13;period. Also, Return After Taxes on Distributions and Sale of Fund Shares for a &#13;period may be greater than or equal to Return After Taxes on Distributions for &#13;the same period because of losses realized on the sale of Fund shares.</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:PerformanceTableExplanationAfterTaxHigher contextRef="AsOf2012-12-20_S000004845Member">Return After Taxes on Distributions for a period may be the same as Return &#13;Before Taxes for a period because no taxable distributions were made during that &#13;period. Also, Return After Taxes on Distributions and Sale of Fund Shares for a &#13;period may be greater than or equal to Return After Taxes on Distributions for &#13;the same period because of losses realized on the sale of Fund shares.</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:PerformanceTableExplanationAfterTaxHigher contextRef="AsOf2012-12-20_S000004850Member">Return After Taxes on Distributions for a period may be the same as Return &#13;Before Taxes for a period because no taxable distributions were made during that &#13;period. Also, Return After Taxes on Distributions and Sale of Fund Shares for a &#13;period may be greater than or equal to Return After Taxes on Distributions for &#13;the same period because of losses realized on the sale of Fund shares.</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:PerformanceTableExplanationAfterTaxHigher contextRef="AsOf2012-12-20_S000004852Member">Return After Taxes on Distributions for a period may be the same as Return &#13;Before Taxes for a period because no taxable distributions were made during that &#13;period. Also, Return After Taxes on Distributions and Sale of Fund Shares for a &#13;period may be greater than or equal to Return After Taxes on Distributions for &#13;the same period because of losses realized on the sale of Fund shares.</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:PerformanceTableExplanationAfterTaxHigher contextRef="AsOf2012-12-20_S000004855Member">Return After Taxes on Distributions for a period may be the same as Return &#13;Before Taxes for a period because no taxable distributions were made during that &#13;period. Also, Return After Taxes on Distributions and Sale of Fund Shares for a &#13;period may be greater than or equal to Return After Taxes on Distributions for &#13;the same period because of losses realized on the sale of Fund shares.</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:PerformanceTableExplanationAfterTaxHigher contextRef="AsOf2012-12-20_S000004856Member">Return After Taxes on Distributions for a period may be the same as Return &#13;Before Taxes for a period because no taxable distributions were made during that &#13;period. Also, Return After Taxes on Distributions and Sale of Fund Shares for a &#13;period may be greater than or equal to Return After Taxes on Distributions for &#13;the same period because of losses realized on the sale of Fund shares.</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:PerformanceTableExplanationAfterTaxHigher contextRef="AsOf2012-12-20_S000004857Member">Return After Taxes on Distributions for a period may be the same as Return &#13;Before Taxes for a period because no taxable distributions were made during that &#13;period. Also, Return After Taxes on Distributions and Sale of Fund Shares for a &#13;period may be greater than or equal to Return After Taxes on Distributions for &#13;the same period because of losses realized on the sale of Fund shares.</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004838Member_C000013098Member" unitRef="Ratio" decimals="INF">0.0221</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004838Member_C000013099Member" unitRef="Ratio" decimals="INF">0.0157</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004838Member_C000013100Member" unitRef="Ratio" decimals="INF">0.0157</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004838Member_C000063946Member" unitRef="Ratio" decimals="INF">0.0252</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004859Member_C000013163Member" unitRef="Ratio" decimals="INF">0.0218</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004859Member_C000013164Member" unitRef="Ratio" decimals="INF">0.0154</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004859Member_C000013165Member" unitRef="Ratio" decimals="INF">0.0154</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004859Member_C000092725Member" unitRef="Ratio" decimals="INF">0.0248</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004864Member_C000013178Member" unitRef="Ratio" decimals="INF">0.0268</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004864Member_C000013179Member" unitRef="Ratio" decimals="INF">0.0206</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004864Member_C000013180Member" unitRef="Ratio" decimals="INF">0.0207</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004864Member_C000063956Member" unitRef="Ratio" decimals="INF">0.0301</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004865Member_C000013181Member" unitRef="Ratio" decimals="INF">0.0251</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004865Member_C000013182Member" unitRef="Ratio" decimals="INF">0.0189</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004865Member_C000013183Member" unitRef="Ratio" decimals="INF">0.0190</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004865Member_C000092726Member" unitRef="Ratio" decimals="INF">0.0288</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004840Member_C000013104Member" unitRef="Ratio" decimals="INF">0.0237</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004840Member_C000013105Member" unitRef="Ratio" decimals="INF">0.0175</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004840Member_C000013106Member" unitRef="Ratio" decimals="INF">0.0174</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004840Member_C000063947Member" unitRef="Ratio" decimals="INF">0.0269</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004845Member_C000013120Member" unitRef="Ratio" decimals="INF">0.0226</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004845Member_C000013121Member" unitRef="Ratio" decimals="INF">0.0163</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004845Member_C000013122Member" unitRef="Ratio" decimals="INF">0.0163</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004845Member_C000092719Member" unitRef="Ratio" decimals="INF">0.0257</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004850Member_C000013136Member" unitRef="Ratio" decimals="INF">0.0234</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004850Member_C000013137Member" unitRef="Ratio" decimals="INF">0.0172</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004850Member_C000013138Member" unitRef="Ratio" decimals="INF">0.0171</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004850Member_C000063950Member" unitRef="Ratio" decimals="INF">0.0266</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004852Member_C000013142Member" unitRef="Ratio" decimals="INF">0.0314</rr:ThirtyDayYield>
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    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004852Member_C000013144Member" unitRef="Ratio" decimals="INF">0.0255</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004852Member_C000092722Member" unitRef="Ratio" decimals="INF">0.0348</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004855Member_C000013151Member" unitRef="Ratio" decimals="INF">0.0284</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004855Member_C000013152Member" unitRef="Ratio" decimals="INF">0.0224</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004855Member_C000013153Member" unitRef="Ratio" decimals="INF">0.0224</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004855Member_C000063952Member" unitRef="Ratio" decimals="INF">0.0319</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004856Member_C000013154Member" unitRef="Ratio" decimals="INF">0.0223</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004856Member_C000013155Member" unitRef="Ratio" decimals="INF">0.0160</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004856Member_C000013156Member" unitRef="Ratio" decimals="INF">0.0159</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004856Member_C000092724Member" unitRef="Ratio" decimals="INF">0.0254</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004857Member_C000013157Member" unitRef="Ratio" decimals="INF">0.0250</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004857Member_C000013158Member" unitRef="Ratio" decimals="INF">0.0188</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004857Member_C000013159Member" unitRef="Ratio" decimals="INF">0.0188</rr:ThirtyDayYield>
    <rr:ThirtyDayYield contextRef="AsOf2012-12-20_S000004857Member_C000063953Member" unitRef="Ratio" decimals="INF">0.0283</rr:ThirtyDayYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004838Member_C000013098Member" unitRef="Ratio" decimals="INF">0.0358</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004838Member_C000013099Member" unitRef="Ratio" decimals="INF">0.0254</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004838Member_C000013100Member" unitRef="Ratio" decimals="INF">0.0254</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004838Member_C000063946Member" unitRef="Ratio" decimals="INF">0.0408</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004859Member_C000013163Member" unitRef="Ratio" decimals="INF">0.0361</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004859Member_C000013164Member" unitRef="Ratio" decimals="INF">0.0255</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004859Member_C000013165Member" unitRef="Ratio" decimals="INF">0.0255</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004859Member_C000092725Member" unitRef="Ratio" decimals="INF">0.0410</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004864Member_C000013178Member" unitRef="Ratio" decimals="INF">0.0439</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004864Member_C000013179Member" unitRef="Ratio" decimals="INF">0.0337</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004864Member_C000013180Member" unitRef="Ratio" decimals="INF">0.0339</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004864Member_C000063956Member" unitRef="Ratio" decimals="INF">0.0493</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004865Member_C000013181Member" unitRef="Ratio" decimals="INF">0.0411</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004865Member_C000013182Member" unitRef="Ratio" decimals="INF">0.0309</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004865Member_C000013183Member" unitRef="Ratio" decimals="INF">0.0311</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004865Member_C000092726Member" unitRef="Ratio" decimals="INF">0.0471</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004840Member_C000013104Member" unitRef="Ratio" decimals="INF">0.0387</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004840Member_C000013105Member" unitRef="Ratio" decimals="INF">0.0286</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004840Member_C000013106Member" unitRef="Ratio" decimals="INF">0.0284</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004840Member_C000063947Member" unitRef="Ratio" decimals="INF">0.0439</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004845Member_C000013120Member" unitRef="Ratio" decimals="INF">0.0370</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004845Member_C000013121Member" unitRef="Ratio" decimals="INF">0.0267</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004845Member_C000013122Member" unitRef="Ratio" decimals="INF">0.0267</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004845Member_C000092719Member" unitRef="Ratio" decimals="INF">0.0421</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004850Member_C000013136Member" unitRef="Ratio" decimals="INF">0.0390</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004850Member_C000013137Member" unitRef="Ratio" decimals="INF">0.0287</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004850Member_C000013138Member" unitRef="Ratio" decimals="INF">0.0285</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004850Member_C000063950Member" unitRef="Ratio" decimals="INF">0.0444</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004852Member_C000013142Member" unitRef="Ratio" decimals="INF">0.0536</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004852Member_C000013143Member" unitRef="Ratio" decimals="INF">0.0437</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004852Member_C000013144Member" unitRef="Ratio" decimals="INF">0.0435</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004852Member_C000092722Member" unitRef="Ratio" decimals="INF">0.0594</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004855Member_C000013151Member" unitRef="Ratio" decimals="INF">0.0470</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004855Member_C000013152Member" unitRef="Ratio" decimals="INF">0.0371</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004855Member_C000013153Member" unitRef="Ratio" decimals="INF">0.0371</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004855Member_C000063952Member" unitRef="Ratio" decimals="INF">0.0528</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004856Member_C000013154Member" unitRef="Ratio" decimals="INF">0.0365</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004856Member_C000013155Member" unitRef="Ratio" decimals="INF">0.0262</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004856Member_C000013156Member" unitRef="Ratio" decimals="INF">0.0260</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004856Member_C000092724Member" unitRef="Ratio" decimals="INF">0.0416</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004857Member_C000013157Member" unitRef="Ratio" decimals="INF">0.0408</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004857Member_C000013158Member" unitRef="Ratio" decimals="INF">0.0307</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004857Member_C000013159Member" unitRef="Ratio" decimals="INF">0.0307</rr:ThirtyDayTaxEquivalentYield>
    <rr:ThirtyDayTaxEquivalentYield contextRef="AsOf2012-12-20_S000004857Member_C000063953Member" unitRef="Ratio" decimals="INF">0.0462</rr:ThirtyDayTaxEquivalentYield>
    <rr:LowestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;and the lowest quarterly return was&lt;/p&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:LowestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;and the lowest quarterly return was&lt;/p&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:LowestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;and the lowest quarterly return was&lt;/p&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:LowestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;and the lowest quarterly return was&lt;/p&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:LowestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;and the lowest quarterly return was&lt;/p&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:LowestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;and the lowest quarterly return was&lt;/p&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:LowestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;and the lowest quarterly return was&lt;/p&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:LowestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;and the lowest quarterly return was&lt;/p&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:LowestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;and the lowest quarterly return was&lt;/p&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:LowestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;and the lowest quarterly return was&lt;/p&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:LowestQuarterlyReturnLabel contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 9pt/10pt Times New Roman, Times, Serif; margin: 2.8pt 0"&gt;and the lowest quarterly return was&lt;/p&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:RiskNondiversifiedStatus contextRef="AsOf2012-12-20_S000004838Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;</rr:RiskNondiversifiedStatus>
    <rr:RiskNondiversifiedStatus contextRef="AsOf2012-12-20_S000004859Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;</rr:RiskNondiversifiedStatus>
    <rr:RiskNondiversifiedStatus contextRef="AsOf2012-12-20_S000004864Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;</rr:RiskNondiversifiedStatus>
    <rr:RiskNondiversifiedStatus contextRef="AsOf2012-12-20_S000004865Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;</rr:RiskNondiversifiedStatus>
    <rr:RiskNondiversifiedStatus contextRef="AsOf2012-12-20_S000004840Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;</rr:RiskNondiversifiedStatus>
    <rr:RiskNondiversifiedStatus contextRef="AsOf2012-12-20_S000004845Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;</rr:RiskNondiversifiedStatus>
    <rr:RiskNondiversifiedStatus contextRef="AsOf2012-12-20_S000004850Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;</rr:RiskNondiversifiedStatus>
    <rr:RiskNondiversifiedStatus contextRef="AsOf2012-12-20_S000004852Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;</rr:RiskNondiversifiedStatus>
    <rr:RiskNondiversifiedStatus contextRef="AsOf2012-12-20_S000004855Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;</rr:RiskNondiversifiedStatus>
    <rr:RiskNondiversifiedStatus contextRef="AsOf2012-12-20_S000004856Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;</rr:RiskNondiversifiedStatus>
    <rr:RiskNondiversifiedStatus contextRef="AsOf2012-12-20_S000004857Member">&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 5.6pt 0"&gt;Issuer Diversification Risk. The Fund is &amp;#147;non-diversified&amp;#148;&#13;which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are &amp;#147;diversified.&amp;#148;&#13;&amp;#160;Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to&#13;risks affecting such issuers than a more diversified fund might be.&lt;/p&gt;</rr:RiskNondiversifiedStatus>
</xbrli:xbrl>
