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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Summit Global Investments U.S. Low Volatility Equity Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Summit Global Investments U.S. Low Volatility Equity Fund (the "Fund") seeks to outperform the S&P 500® Index over a market cycle while reducing overall volatility. There can be no guarantee that the Fund will achieve its investment objective.

Expense [Heading] rr_ExpenseHeading Expenses and Fees
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 charge discounts on Class A Shares if you invest, or agree to invest in the future, at least $50,000 in the Fund. More information about these and other discounts is available from your financial professional, in the section of the Prospectus entitled "Shareholder Information — Sales Charges" and in the section of the Fund's Statement of Additional Information ("SAI") entitled "Purchase and Redemption Information — Reducing or Eliminating the Front-End Sales Charge."

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 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 2014-12-31
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 transactions 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. For the fiscal year ended August 31, 2013, the Fund's portfolio turnover rate was 81% of the average value of its portfolio.

Portfolio Turnover, Rate rr_PortfolioTurnoverRate 81.00%
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 Class A and Retail Shares or $1,000,000 in the Class I Shares of the Fund and 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:

Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal circumstances, the Fund will invest at least 80% of its net assets (including borrowings for investment purposes) in equity securities, primarily common stocks, of companies within the Russell 1000® Index and S&P 500® Index. The Fund's investments will generally consist of securities, which may include common stocks, preferred stocks, warrants to acquire common stock, and securities convertible into common stock. The Fund purchases equity securities traded in the U.S. on registered exchanges or the over-the-counter market.


The Fund's investment adviser attempts to lower the Fund's market risk by investing in U.S. equity securities that lower the overall volatility of the Fund's portfolio as compared to the S&P 500® Index. The Fund invests in stocks that exhibit less volatile stock price patterns, strengthening business metrics (i.e., earnings, debt, return on assets, competition, customers, industry, etc.) and quantitative factors such as earnings variability, leverage, volatility, price/book, price/cash flow, etc. The Fund's investment adviser selects securities for the Fund that it anticipates will produce less volatility with more capital protection and more consistent returns.

Risk [Heading] rr_RiskHeading Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

Loss of money is a risk of investing in the Fund. In addition, your investment in the Fund may be subject to the following principal risks:


n  Common Stock Risk. Investments in common stocks are subject to market, economic and business risks that will cause their price to fluctuate over time. Therefore, an investment in the Fund may be more suitable for long-term investors who can bear the risk of these fluctuations.


n  Management Risk. The Fund is subject to the risk of poor management stock selection. In other words, the individual stocks in the Fund may not perform as well as expected, and/or the Fund's portfolio management practices do not work to achieve their desired result.


n  Market Risk. The net asset value ("NAV") of the Fund will change with changes in the market value of its portfolio positions. Investors may lose money. Although the Fund will invest in stocks the Fund's investment adviser believes will produce less volatility, there is no guarantee that the stocks will perform as expected.


n  Opportunity Risk. As with all mutual funds, the Fund is subject to the risk of missing out on an opportunity because the assets necessary to take advantage of it are tied up in less advantageous investments.

Risk Lose Money [Text] rr_RiskLoseMoney Investors may lose money.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance Information
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

No performance information is presented because the Fund has not been operational for a full calendar year. Class A Shares and Retail Shares of the Fund have not commenced operations as of the date of this Prospectus. The Fund intends to evaluate its performance as compared to that of the S&P 500® Index.

Performance One Year or Less [Text] rr_PerformanceOneYearOrLess No performance information is presented because the Fund has not been operational for a full calendar year.
Class A
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.25%
Maximum Deferred Sales Charge (Load) rr_MaximumDeferredSalesChargeOverOther none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee (as a percentage of amount redeemed, if applicable) rr_RedemptionFeeOverRedemption (1.50%)
Exchange Fee rr_ExchangeFeeOverRedemption 1.50%
Management Fees rr_ManagementFeesOverAssets 0.70%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 2.04%
Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 2.99%
Less Fee Waivers and Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (1.76%) [1]
Total Annual Portfolio Operating Expenses After Fee Waivers and/or Expense Reimbursements rr_NetExpensesOverAssets 1.23%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts on Class A Shares if you invest, or agree to invest in the future, at least $50,000 in the Fund.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 644
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,075
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,710
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 3,413
Retail Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) rr_MaximumDeferredSalesChargeOverOther none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee (as a percentage of amount redeemed, if applicable) rr_RedemptionFeeOverRedemption (1.50%)
Exchange Fee rr_ExchangeFeeOverRedemption 1.50%
Management Fees rr_ManagementFeesOverAssets 0.70%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 2.04%
Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 2.99%
Less Fee Waivers and Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (1.76%) [1]
Total Annual Portfolio Operating Expenses After Fee Waivers and/or Expense Reimbursements rr_NetExpensesOverAssets 1.23%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 125
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 581
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,251
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 3,048
Class I
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) rr_MaximumDeferredSalesChargeOverOther none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee (as a percentage of amount redeemed, if applicable) rr_RedemptionFeeOverRedemption (1.50%)
Exchange Fee rr_ExchangeFeeOverRedemption 1.50%
Management Fees rr_ManagementFeesOverAssets 0.70%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 2.04%
Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 2.74%
Less Fee Waivers and Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (1.76%) [1]
Total Annual Portfolio Operating Expenses After Fee Waivers and/or Expense Reimbursements rr_NetExpensesOverAssets 0.98%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 9,997
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 50,378
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 112,391
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 280,109
[1] The Fund's investment adviser has contractually agreed to waive management fees and reimburse expenses through December 31, 2014 to the extent that Total Annual Fund Operating Expenses (excluding certain items discussed below) exceed 1.23% for Class A Shares and Retail Shares and 0.98% for Class I Shares. In determining the investment adviser's obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account and could cause net Total Annual Fund Operating Expenses to exceed 1.23% or 0.98%, as applicable: acquired fund fees and expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation may not be terminated before December 31, 2014 without the approval of the Board of Directors of The RBB Fund, Inc. If at any time during the three years from January 1, 2014 through December 31, 2016 in which the advisory agreement is in effect, the Fund's Total Annual Fund Operating Expenses for that year are less than 1.23% of the average daily net assets attributable to the Fund's Class A Shares or Retail Shares or less than 0.98% of the average daily net assets attributable to the Fund's Class I Shares, the Adviser is entitled to reimbursement by the Fund of the advisory fees forgone and other payments remitted by the Adviser to the Fund during such three-year period.