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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName MARSHALL FUNDS INC d/b/a BMO FUNDS
Prospectus Date rr_ProspectusDate Dec. 29, 2011
BMO Lloyd George Emerging Markets Equity Fund | Class Y
 
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Redemption Fee (as a percentage of amount redeemed, for shares held less than 30 days) rr_RedemptionFeeOverRedemption 2.00%
Management Fees rr_ManagementFeesOverAssets 0.90% [1]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.85% [2]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.75%
Fee Waiver and Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets 0.35% [3]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement rr_NetExpensesOverAssets 1.40% [3]
1 Year rr_ExpenseExampleYear01 143
3 Years rr_ExpenseExampleYear03 517
5 Years rr_ExpenseExampleYear05 916
10 Years rr_ExpenseExampleYear10 2,033
Annual Return 2009 rr_AnnualReturn2009 67.91%
Annual Return 2010 rr_AnnualReturn2010 19.20%
Year to Date Return, Label rr_YearToDateReturnLabel The return for the Class Y shares of the Fund from January 1, 2011 through September 30, 2011
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2011
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (26.46%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 32.53%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Jun. 30, 2010
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (10.10%)
1 Year rr_AverageAnnualReturnYear01 19.20%
Since Commencement of Operations rr_AverageAnnualReturnSinceInception 41.90%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 23, 2008
BMO Lloyd George Emerging Markets Equity Fund | Class Y | Return After Taxes on Distributions
 
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 17.49%
Since Commencement of Operations rr_AverageAnnualReturnSinceInception 40.03%
BMO Lloyd George Emerging Markets Equity Fund | Class Y | Return After Taxes on Distributions and Sale of Fund Shares
 
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 13.60%
Since Commencement of Operations rr_AverageAnnualReturnSinceInception 35.62%
BMO Lloyd George Emerging Markets Equity Fund | Class I
 
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Redemption Fee (as a percentage of amount redeemed, for shares held less than 30 days) rr_RedemptionFeeOverRedemption 2.00%
Management Fees rr_ManagementFeesOverAssets 0.90% [1]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.60% [2]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.50%
Fee Waiver and Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets 0.35% [3]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement rr_NetExpensesOverAssets 1.15% [3]
1 Year rr_ExpenseExampleYear01 117
3 Years rr_ExpenseExampleYear03 440
5 Years rr_ExpenseExampleYear05 758
10 Years rr_ExpenseExampleYear10 1,761
1 Year rr_AverageAnnualReturnYear01 19.37%
Since Commencement of Operations rr_AverageAnnualReturnSinceInception 42.17%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 23, 2008
BMO Lloyd George Emerging Markets Equity Fund
 
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading
Objective [Heading] rr_ObjectiveHeading
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
Expense [Heading] rr_ExpenseHeading
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption
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 July 6, 2013
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 34.00%
Expense Example [Heading] rr_ExpenseExampleHeading
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
Strategy [Heading] rr_StrategyHeading
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Risk [Heading] rr_RiskHeading
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
Risk Lose Money [Text] rr_RiskLoseMoney The net asset value of the Fund will vary and you could lose money by investing in the Fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Fund is not a deposit of BMO Harris Bank, N.A. or any of its affiliates and is not insured or guaranteed by the FDIC or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart shows the Fund's total returns before taxes for the past year, while the table compares the Fund's average annual total returns to the returns of a broad measure of market performance and an index of funds with similar investment objectives.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.bmofundsus.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please keep in mind that past performance, before and after taxes, does not represent how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Performance Table Heading rr_PerformanceTableHeading
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest historical individual marginal federal income tax rates and do not reflect the effect of any applicable state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred After-tax returns shown are not relevant to investors holding shares through tax-deferred programs, such as IRAs or 401(k) plans.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for Class Y, and after-tax returns for Class I will vary.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
BMO Lloyd George Emerging Markets Equity Fund | EMI (reflects no deduction for fees, expenses or taxes)
 
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 18.88%
Since Commencement of Operations rr_AverageAnnualReturnSinceInception 46.60%
BMO Lloyd George Emerging Markets Equity Fund | LEMI (reflects deduction of fees and no deduction for sales charges or taxes)
 
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 20.14%
Since Commencement of Operations rr_AverageAnnualReturnSinceInception 46.41%
[1] The Fund's management fee in the fee table has been restated. Effective December 29, 2011, the Fund's management fee was reduced from 1.00% to 0.90%.
[2] The expense information in the fee table has been restated to reflect that effective September 1, 2011, the Fund entered into a new transfer agency agreement.
[3] M&I Investment Management Corp. (Adviser) has agreed to waive or reduce its investment advisory fee and reimburse expenses to the extent necessary to prevent total annual operating expenses (excluding interest, taxes, brokerage commissions, other investment-related costs and extraordinary expenses, such as litigation and other expenses not incurred in the ordinary course of the Fund's business and Acquired Fund Fees and Expenses) from exceeding 1.40% for Class Y and 1.15% for Class I through July 6, 2013. The Adviser may not terminate this arrangement prior to July 6, 2013 unless the investment advisory agreement is terminated.