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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading American Beacon Emerging Markets Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Fund’s investment objective is long-term capital appreciation.
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 44% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 44.00%
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 issuers that:

 
u
are primarily listed on the trading market of an emerging market country;

 
u
are headquartered in an emerging market country; or

 
u
derive 50% or more of their revenues from, or have 50% or more of their assets in, an emerging market country.

An emerging market country is one that:

 
u
has an emerging stock market as defined by the International Finance Corporation;

 
u
has a low- to middle-income economy according to the World Bank;

 
u
is included in the IFC Investable Index or the Morgan Stanley Capital International® Emerging Markets Index; or

 
u
has a per-capita gross national product of $10,000 or less.

The Fund’s equity investments may include common stocks, preferred stocks, securities convertible into common stocks and depositary receipts (collectively referred to as “stocks”). The Fund may invest in companies of all market capitalizations.

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.

One sub-advisor combines a top-down country allocation investment approach with bottom-up stock selection. The sub-advisor first allocates its portion of the Fund’s assets among emerging market countries based on relative economic, political and social fundamentals, stock valuations and investor sentiment. The sub-advisor then selects individual securities within these countries on the basis of attractive growth characteristics, reasonable valuations and company managements with a strong shareholder value orientation. To attempt to manage risk, the sub-advisor emphasizes thorough macroeconomic and fundamental research.

The second sub-advisor utilizes a bottom-up investment strategy that is value-oriented and research-driven. The sub-advisor buys stocks that exhibit good value characteristics, strong business fundamentals and positive business momentum. The focus on business momentum helps the sub-advisor avoid the value trap, while bottom-up fundamental security analysis helps to verify their quantitative analysis. Lastly, they focus on the preservation of capital as they believe it is the key to long-term performance.

The third sub-advisor uses a Graham and Dodd based value oriented approach to managing emerging market equity investments. The strategy focuses on fundamental research at the company level and attempts to identify securities trading at significant discounts to their long term intrinsic value. This discount, or “margin of safety” is typically a by-product of short term price volatility and market inefficiency and the sub-advisor seeks to outperform the benchmark over the long-term by building concentrated portfolios of undervalued companies which they believe offer attractive long-term appreciation potential.

The sub-advisors may consider potential changes in currency exchange rates when choosing stocks. A sub-advisor may trade forward foreign currency contracts, including NDFs, or currency futures in an attempt to reduce the Fund’s risk exposure to adverse fluctuations in currency exchange rates.

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.
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:

Currency Risk

Foreign currencies may decline in value relative to the U.S. dollar and affect the Fund’s investments in foreign (non-U.S.) currencies or in securities that trade in, and receive revenues in, or in derivatives that provide exposure to, foreign (non-U.S.) currencies.

Emerging Markets Risk

When investing in emerging markets, the risks mentioned below of investing in foreign securities are heightened. Emerging markets have unique risks that are greater than or in addition to investing in developed markets because emerging markets are generally smaller, less developed, less liquid and more volatile than the securities markets of the U.S. and other developed markets. There are also risks of: greater political uncertainties; an economy’s dependence on revenues from particular commodities or on international aid or development assistance; currency transfer restrictions; a limited number of potential buyers for such securities; and delays and disruptions in securities settlement procedures. In addition, there may be more volatile rates of return.

Equity Investments Risk

Equity securities generally are subject to market risk. The Fund’s investments in equity securities may include common stocks, preferred stocks, securities convertible into or exchangeable for common stocks, rights, warrants and depository receipts. 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 rights and warrants may be more speculative than certain other types of investments because rights and warrants do not carry with them dividend or voting rights with respect to the underlying securities, or any rights in the assets of the issuer. In addition, the value of a right or a warrant does not necessarily change with the value of the underlying securities, and a right or a warrant ceases to have value if it is not exercised prior to its expiration date. Depository receipts are subject to certain of the risks associated with investing directly in foreign securities.

Foreign Investing Risk

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, (6) less government regulation and supervision of foreign stock exchanges, brokers and listed companies, and (7) delays in transaction settlement in some foreign markets.

Futures Contracts and Foreign Currency Forward Contracts Risk

Futures contracts and foreign currency forward contracts, including NDFs, are derivative instruments pursuant to a contract with a counterparty to pay a fixed price for an agreed amount of securities or other underlying assets at an agreed date or to buy or sell a specific currency at a future date at a price set at the time of the contract. The use of such derivative instruments may expose the Fund to additional risks that it would not be subject to if they invested directly in the securities underlying those derivatives. Futures contracts may experience potentially dramatic price changes (losses) and imperfect correlations between the price of the contract and the underlying security, index or currency which will increase the volatility of the Fund and may involve a small investment of cash relative to the magnitude of the risk assumed. There can be no assurance that any strategy used will succeed. Not all forward contracts, including NDFs, require a counterparty to post collateral, which may expose the Fund to greater losses in the event of a default by a counterparty.

Hedging Risk

Gains or losses from positions in hedging instruments may be much greater than the instrument’s original cost. The counterparty may be unable to honor its financial obligation to the Fund. In addition, the Manager or a sub-advisor may be unable to close the transaction at the time it would like or at the price it believes the security is currently worth.

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.

Large Capitalization Companies Risk

The securities of large market capitalization companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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 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 of a particular country 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.

Market Timing Risk

Because the Fund invests in foreign securities, it is particularly subject to the risk of market timing activities. The Fund generally prices foreign securities using their closing prices from the foreign markets in which they trade, typically prior to the Fund’s determination of its net asset value. These prices may be affected by events that occur after the close of a foreign market but before the Fund prices its shares. In such instances, the Fund may fair value foreign securities. However, some investors may engage in frequent short-term trading in the Fund to take advantage of any price differentials that may be reflected in the net asset value of the Fund’s shares. There is no assurance that fair valuation of securities can reduce or eliminate market timing. While the Manager monitors trading in Fund shares, there is no guarantee that it can detect all market timing activities.

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 and Medium Capitalization Companies Risk

Investing in the securities of small and medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization and more established companies, since small and medium-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.
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® Emerging Markets 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 Y Class shares on March 1, 2010, A Class shares on May 17, 2010 and C Class shares on September 1, 2010. In the table below, the performance of the Institutional Class shares is shown for Y Class shares and the performance of the Investor Class shares is shown for A Class and C Class shares, prior to the dates such newer classes were first offered. 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 new 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:
35.42%
(1/1/03 through 12/31/12)
(2nd Quarter 2009)
Lowest Quarterly Return:
-26.34%
(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, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 35.42%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarterly Return:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (26.34%)
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.
MSCI Emerging Markets Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 18.22% [1]
5 Years rr_AverageAnnualReturnYear05 (0.92%) [1]
10 Years rr_AverageAnnualReturnYear10 16.52% [1]
Lipper Emerging Markets Funds Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 20.08% [1]
5 Years rr_AverageAnnualReturnYear05 (1.48%) [1]
10 Years rr_AverageAnnualReturnYear10 15.89% [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
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Management fees rr_ManagementFeesOverAssets 0.80%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.70%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total annual fund operating expenses rr_ExpensesOverAssets 1.51% [2]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.15%)
Total annual fund operating expenses after expense reduction and reimbursement rr_NetExpensesOverAssets 1.36% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 138
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 462
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 809
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,789
Annual Return 2003 rr_AnnualReturn2003 57.80%
Annual Return 2004 rr_AnnualReturn2004 24.70%
Annual Return 2005 rr_AnnualReturn2005 28.68%
Annual Return 2006 rr_AnnualReturn2006 32.91%
Annual Return 2007 rr_AnnualReturn2007 34.12%
Annual Return 2008 rr_AnnualReturn2008 (51.44%)
Annual Return 2009 rr_AnnualReturn2009 71.39%
Annual Return 2010 rr_AnnualReturn2010 18.29%
Annual Return 2011 rr_AnnualReturn2011 21.64%
Annual Return 2012 rr_AnnualReturn2012 17.56%
1 Year rr_AverageAnnualReturnYear01 17.56% [1]
5 Years rr_AverageAnnualReturnYear05 (1.94%) [1]
10 Years rr_AverageAnnualReturnYear10 15.14% [1]
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 31, 2000 [1]
Institutional Class | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 17.12% [1]
5 Years rr_AverageAnnualReturnYear05 (2.98%) [1]
10 Years rr_AverageAnnualReturnYear10 13.45% [1]
Institutional Class | After Taxes on Distributions and Sales
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 11.41% [1]
5 Years rr_AverageAnnualReturnYear05 1.94% [1]
10 Years rr_AverageAnnualReturnYear10 13.22% [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
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Management fees rr_ManagementFeesOverAssets 0.80%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 1.04%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total annual fund operating expenses rr_ExpensesOverAssets 1.85% [2]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.05%)
Total annual fund operating expenses after expense reduction and reimbursement rr_NetExpensesOverAssets 1.80% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 183
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 577
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 996
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,166
1 Year rr_AverageAnnualReturnYear01 17.02% [1]
5 Years rr_AverageAnnualReturnYear05 (2.33%) [1]
10 Years rr_AverageAnnualReturnYear10 14.75% [1]
Inception Date rr_AverageAnnualReturnInceptionDate Oct. 01, 2002 [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
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Management fees rr_ManagementFeesOverAssets 0.80%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.92%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total annual fund operating expenses rr_ExpensesOverAssets 1.73% [2]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.27%)
Total annual fund operating expenses after expense reduction and reimbursement rr_NetExpensesOverAssets 1.46% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 149
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 519
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 914
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,020
1 Year rr_AverageAnnualReturnYear01 17.29% [1]
5 Years rr_AverageAnnualReturnYear05 (2.02%) [1]
10 Years rr_AverageAnnualReturnYear10 15.09% [1]
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 01, 2010 [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
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Management fees rr_ManagementFeesOverAssets 0.80%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.96%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total annual fund operating expenses rr_ExpensesOverAssets 2.02% [2]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.22%)
Total annual fund operating expenses after expense reduction and reimbursement rr_NetExpensesOverAssets 1.80% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 747
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,151
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,580
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,770
1 Year rr_AverageAnnualReturnYear01 16.98% [1]
5 Years rr_AverageAnnualReturnYear05 (2.35%) [1]
10 Years rr_AverageAnnualReturnYear10 14.74% [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%
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Management fees rr_ManagementFeesOverAssets 0.80%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 1.94%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total annual fund operating expenses rr_ExpensesOverAssets 3.75% [2]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.20%)
Total annual fund operating expenses after expense reduction and reimbursement rr_NetExpensesOverAssets 2.55% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 358
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,036
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,833
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 3,916
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 258
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 1,036
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,833
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 3,916
1 Year rr_AverageAnnualReturnYear01 16.17% [1]
5 Years rr_AverageAnnualReturnYear05 (2.68%) [1]
10 Years rr_AverageAnnualReturnYear10 14.54% [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, C Class, Y Class, Institutional Class, and Investor Class of the Fund for Other Expenses, as applicable, through February 28, 2014 to the extent that Total Annual Fund Operating Expenses exceed 1.79% for the A Class, 2.54% for the C Class, 1.45% for the Y Class, 1.35% for the Institutional Class, and 1.79% for the Investor Class (excluding taxes, brokerage commissions, acquired fund fees and expenses and other extraordinary expenses such as litigation). The contractual expense reimbursement 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.