XML 15 R33.htm IDEA: XBRL DOCUMENT v2.4.0.6
Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading American Beacon Small Cap Value Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Fund’s investment objective is long-term capital appreciation and current income.
Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales discounts if you and your eligible family members invest, or agree to invest in the future, at least $50,000 in the A Class shares of the American Beacon Funds. More information about these and other discounts is available from your financial professional and in “Choosing Your Share Class” on page 101 of the Prospectus and “Additional Purchase and Sale Information for A Class Shares” on page 78 of the statement of additional information.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination 2014-02-28
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 51% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 51.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales discounts if you and your eligible family members invest, or agree to invest in the future, at least $50,000 in the A Class shares of the American Beacon Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees The Total Annual Fund Operating Expenses do not correlate to the ratio of expenses to average net assets provided in the Fund's Financial Highlights table, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption Assuming no redemption of shares:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal circumstances, at least 80% of the Fund’s net assets (plus the amount of any borrowings for investment purposes) are invested in equity securities of small market capitalization U.S. companies. These companies have market capitalizations of $4 billion or less at the time of investment. The Fund’s investments may include common stocks, preferred stocks, securities convertible into common stocks, real estate investment trusts (“REITs”), American Depositary Receipts (“ADRs”) and U.S. dollar-denominated foreign stocks trading on U.S. exchanges (collectively, “stocks”).

The Manager allocates the assets of the Fund among different sub-advisors. The Manager believes that this strategy may help the Fund outperform other investment styles over the longer term while reducing volatility and downside risk.

The sub-advisors select stocks that, in their opinion, have most or all of the following characteristics (relative to the Russell 2000® Index):

 
u
above-average earnings growth potential,

 
u
below-average price to earnings ratio, and

 
u
below-average price to book value ratio.

Each of the sub-advisors determines the earnings growth prospects of companies based upon a combination of internal and external research using fundamental analysis and considering changing economic trends. The decision to sell a stock is typically based on the belief that the company is no longer considered undervalued or shows deteriorating fundamentals, or that better investment opportunities exist in other stocks.

The Fund may invest cash balances in money market funds and may purchase and sell futures contracts to gain market exposure on cash balances or reduce market exposure in anticipation of liquidity needs.

The Fund may lend its securities to broker-dealers and other institutions to earn additional income.
Risk [Heading] rr_RiskHeading Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
There is no assurance that the Fund will achieve its investment objective and you could lose part or all of your investment in the Fund. The Fund is not designed for investors who need an assured level of income and is intended to be a long-term investment. The Fund is not a complete investment program and may not be appropriate for all investors. Investors should carefully consider their own investment goals and risk tolerance before investing in the Fund. The principal risks of investing in the Fund are:

Equity Investments Risk

Equity securities generally are sinvesting in the Fund areubject to market risk. The Fund’s investments in equity securities may include common stocks, preferred stocks, securities convertible into or exchangeable for common stocks, REITs, ADRs and U.S. dollar-denominated foreign stocks traded on U.S. exchanges. Such investments may expose the Fund to additional risks.

Common stock generally is subordinate to preferred stock upon the liquidation or bankruptcy of the issuing company. Preferred stocks and convertible securities are sensitive to movements in interest rates. In addition, convertible securities are subject to the risk that the credit standing of the issuer may have an effect on the convertible securities’ investment value. Investments in ADRs and U.S. dollar-denominated foreign stocks traded on U.S. exchanges are subject to certain of the risks associated with investing directly in foreign securities. REITs are subject to the risks associated with investing in the real estate industry such as adverse developments affecting the real estate industry and real property values.

Foreign Exposure Risk

 The Fund may invest in securities issued by foreign companies through ADRs and U.S. dollar-denominated foreign stocks trading on U.S. exchanges. ADRs are subject to many of the risks inherent in investing in foreign securities, including, but not limited to, currency fluctuations and political and financial instability in the home country of a particular ADR or foreign stock. Non-U.S. investments carry potential risks not associated with U.S. investments. Such risks include, but are not limited to: (1) currency exchange rate fluctuations, (2) political and financial instability, (3) less liquidity and greater volatility, (4) lack of uniform accounting, auditing and financial reporting standards, (5) increased price volatility, and (6) less government regulation and supervision of foreign stock exchanges, brokers and listed companies.

Futures Contracts Risk

Futures contracts are a type of derivative investment. A derivative refers to any financial instrument whose value is derived, at least in part, from the price of another security or a specified index, asset or rate. The use of derivatives presents risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. Gains or losses in a derivative may be magnified and may be much greater than the derivatives original cost.

There may be an imperfect correlation between the changes in market value of the securities held by the Fund and the prices of futures contracts. There may not be a liquid secondary market for the futures contract. When the Fund purchases or sells a futures contract, it is subject to daily variation margin calls that could be substantial in the event of adverse price movements. If the Fund has insufficient cash to meet daily variation margin requirements, it might need to sell securities at a time when such sales are disadvantageous.

Investment Risk

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. When you sell your shares of the Fund, they could be worth less than what you paid for them. Therefore, you may lose money by investing in the Fund.

Issuer Risk

The value of a security may decline for a number of reasons which directly relate to the issuer, such as management performance, financial leverage and reduced demand for the issuer’s goods or services, as well as the historical and prospective earnings of the issuer and the value of its assets.

Market Events Risk

Turbulence in financial markets and reduced liquidity in equity, credit and fixed-income markets may negatively affect many issuers worldwide which could adversely affect on the Fund.

Market Risk

Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the market, can affect the value of the Fund’s shares. The Fund’s equity investments are subject to stock market risk, which involves the possibility that the value of the Fund’s investments in stocks will decline due to drops in the stock market. From time to time, certain investments held by the Fund may have limited marketability and may be difficult to sell at favorable times or prices. If the Fund is forced to sell such holdings to meet redemption requests or other cash needs, the Fund may have to sell them at a loss.

Securities Lending Risk

To the extent the Fund lends its securities, it may be subject to the following risks. Borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities. The securities in which the collateral is invested may not perform sufficiently to cover the return collateral payments owed to borrowers. In addition, delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions.

Securities Selection Risk

Securities selected by the Manager or a sub-advisor for the Fund may not perform to expectations. This could result in the Fund’s underperformance compared to other funds with similar investment objectives.

Small Capitalization Companies Risk

Investing in the securities of small capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization and more established companies, since small sized companies may have limited operating history, product lines, and financial resources, the securities of these companies may lack sufficient market liquidity and they can be particularly sensitive to expected changes in interest rates, borrowing costs and earnings.

Value Stocks Risk

Value stocks are subject to the risk that their intrinsic value may never be realized by the market or that their prices may go down. While the Fund’s investments in value stocks may limit its downside risk over time, the Fund may produce more modest gains than riskier stock funds as a trade-off for this potentially lower risk. Different investment styles tend to shift in and out of favor, depending on market conditions and investor sentiment. The Fund’s value style could cause the Fund to underperform funds that use a growth or non-value approach to investing or have a broader investment style.
Risk Lose Money [Text] rr_RiskLoseMoney There is no assurance that the Fund will achieve its investment objective and you could lose part or all of your investment in the Fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Fund Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The bar chart and table below provide an indication of risk by showing how the Fund’s performance has varied from year to year. The table shows how the Fund’s performance compares to a broad-based market index and the Lipper® Small-Cap Value Funds Index, a composite of mutual funds comparable to the Fund.

The chart and the table below show the performance of the Fund’s Institutional Class shares for all periods. The Fund began operations of Advisor Class shares on May 1, 2003, Retirement Class Shares on May 1, 2009, Y Class shares on August 3, 2009, A Class shares on May 17, 2010 and C Class shares on September 1, 2010. In the table below, the performance of the Investor Class shares is shown for Advisor Class, A Class and C Class shares and the performance of Institutional Class shares is shown for Y Class shares prior to the dates that the newer class shares were first offered. For Retirement Class shares, performance results before May 1, 2003 are for Investor Class shares and performance results from May 1, 2003 through May 1, 2009 are for Advisor Class shares. In each case, the older share classes would have had similar annual returns to the newer share classes because the shares are invested in the same portfolio securities. However, because the older classes had lower expenses, their performance was better than the newer classes would have realized in the same period. You may obtain updated performance information on the Fund’s website at www.americanbeaconfunds.com. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

Sales charges are not reflected in the bar chart and table below. If those charges were included, returns of A Class shares would be less than those shown.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and table below provide an indication of risk by showing how the Fund's performance has varied from year to year.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.americanbeaconfunds.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Calendar year total returns for Institutional Class shares
Bar Chart Narrative [Text Block] rr_BarChartNarrativeTextBlock
Total Return for the Calendar Year Ended 12/31 of each Year

Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Sales charges are not reflected in the bar chart and table below. If those charges were included, returns of A Class shares would be less than those shown.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarterly Return:
 
24.86%
(1/1/03 through 12/31/12)
 
(2nd Quarter 2003)
Lowest Quarterly Return:
 
-25.63%
(1/1/03 through 12/31/12)
 
(4th Quarter 2008)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarterly Return:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2003
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 24.86%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarterly Return:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (25.63%)
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns For the periods ended December 31, 2012
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred If you hold your Fund shares through a tax-deferred arrangement, such as an IRA or a 401(k), the after-tax returns do not apply to your situation.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for Institutional Class shares; after-tax returns for other share classes will vary.
Russell 2000 Value Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 18.05% [1]
5 Years rr_AverageAnnualReturnYear05 3.55% [1]
10 Years rr_AverageAnnualReturnYear10 9.50% [1]
Lipper Small-Cap Value Funds Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 15.56% [1]
5 Years rr_AverageAnnualReturnYear05 4.33% [1]
10 Years rr_AverageAnnualReturnYear10 10.20% [1]
Institutional Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge load (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.46%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.36%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.10%
Total annual fund operating expenses rr_ExpensesOverAssets 0.92% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 94
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 294
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 510
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,132
Annual Return 2003 rr_AnnualReturn2003 51.77%
Annual Return 2004 rr_AnnualReturn2004 23.51%
Annual Return 2005 rr_AnnualReturn2005 5.79%
Annual Return 2006 rr_AnnualReturn2006 14.68%
Annual Return 2007 rr_AnnualReturn2007 (6.44%)
Annual Return 2008 rr_AnnualReturn2008 (31.92%)
Annual Return 2009 rr_AnnualReturn2009 35.37%
Annual Return 2010 rr_AnnualReturn2010 26.19%
Annual Return 2011 rr_AnnualReturn2011 (4.05%)
Annual Return 2012 rr_AnnualReturn2012 16.52%
1 Year rr_AverageAnnualReturnYear01 16.52% [1]
5 Years rr_AverageAnnualReturnYear05 5.39% [1]
10 Years rr_AverageAnnualReturnYear10 10.71% [1]
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 31, 1998 [1]
Institutional Class | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 15.57% [1]
5 Years rr_AverageAnnualReturnYear05 5.09% [1]
10 Years rr_AverageAnnualReturnYear10 9.80% [1]
Institutional Class | After Taxes on Distributions and Sales
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 11.35% [1]
5 Years rr_AverageAnnualReturnYear05 4.54% [1]
10 Years rr_AverageAnnualReturnYear10 9.20% [1]
Investor Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge load (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.46%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.72%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.10%
Total annual fund operating expenses rr_ExpensesOverAssets 1.28% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 130
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 405
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 701
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,544
1 Year rr_AverageAnnualReturnYear01 16.08% [1]
5 Years rr_AverageAnnualReturnYear05 5.02% [1]
10 Years rr_AverageAnnualReturnYear10 10.37% [1]
Inception Date rr_AverageAnnualReturnInceptionDate Feb. 28, 1999 [1]
Advisor Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge load (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.46%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.61%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.10%
Total annual fund operating expenses rr_ExpensesOverAssets 1.42% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 145
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 450
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 777
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,703
1 Year rr_AverageAnnualReturnYear01 15.91% [1]
5 Years rr_AverageAnnualReturnYear05 4.86% [1]
10 Years rr_AverageAnnualReturnYear10 10.14% [1]
Inception Date rr_AverageAnnualReturnInceptionDate May 01, 2003 [1]
Retirement Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge load (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.46%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other expenses rr_OtherExpensesOverAssets 0.67%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.10%
Total annual fund operating expenses rr_ExpensesOverAssets 1.73% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 176
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 546
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 940
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,042
1 Year rr_AverageAnnualReturnYear01 15.58% [1]
5 Years rr_AverageAnnualReturnYear05 4.66% [1]
10 Years rr_AverageAnnualReturnYear10 10.03% [1]
Inception Date rr_AverageAnnualReturnInceptionDate May 01, 2009 [1]
Y Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge load (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.46%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.45%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.10%
Total annual fund operating expenses rr_ExpensesOverAssets 1.01% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 103
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 321
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 557
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,235
1 Year rr_AverageAnnualReturnYear01 16.39% [1]
5 Years rr_AverageAnnualReturnYear05 5.27% [1]
10 Years rr_AverageAnnualReturnYear10 10.65% [1]
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 03, 2009 [1]
A Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.75%
Maximum deferred sales charge load (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.46%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.73%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.10%
Total annual fund operating expenses rr_ExpensesOverAssets 1.54% [2]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.12%)
Total annual fund operating expenses after expense reduction and reimbursement rr_NetExpensesOverAssets 1.42% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 711
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,021
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,355
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,294
1 Year rr_AverageAnnualReturnYear01 15.91% [1]
5 Years rr_AverageAnnualReturnYear05 4.92% [1]
10 Years rr_AverageAnnualReturnYear10 10.32% [1]
Inception Date rr_AverageAnnualReturnInceptionDate May 17, 2010 [1]
C Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge load (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther 1.00%
Management fees rr_ManagementFeesOverAssets 0.46%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.75%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.10%
Total annual fund operating expenses rr_ExpensesOverAssets 2.31% [2]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.14%)
Total annual fund operating expenses after expense reduction and reimbursement rr_NetExpensesOverAssets 2.17% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 320
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 708
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,223
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,636
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 220
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 708
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,223
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,636
1 Year rr_AverageAnnualReturnYear01 15.05% [1]
5 Years rr_AverageAnnualReturnYear05 4.53% [1]
10 Years rr_AverageAnnualReturnYear10 10.12% [1]
Inception Date rr_AverageAnnualReturnInceptionDate Sep. 01, 2010 [1]
[1] After-tax returns are shown only for Institutional Class shares; after-tax returns for other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. If you hold your Fund shares through a tax-deferred arrangement, such as an IRA or a 401(k), the after-tax returns do not apply to your situation.
[2] The Total Annual Fund Operating Expenses do not correlate to the ratio of expenses to average net assets provided in the Fund's Financial Highlights table, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.
[3] The Manager has contractually agreed to reduce and/or reimburse the A Class and C Class of the Fund for Other Expenses, as applicable, through February 28, 2014 to the extent that Total Annual Fund Operating Expenses exceed 1.32% for the A Class and 2.07% for the C Class (excluding taxes, brokerage commissions, acquired fund fees and expenses and other extraordinary expenses such as litigation). The contractual expense arrangement can be changed by approval of a majority of the Fund's Board of Trustees. The Manager can be reimbursed by the Fund for any contractual or voluntary fee reductions or expense reimbursements if reimbursement to the Manager (a) occurs within three years after the Manager's own reduction or reimbursement and (b) does not cause the Total Annual Fund Operating Expenses of a class to exceed the percentage limit contractually agreed.