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ProspectusDaterr_ProspectusDateOct. 31, 2011
Brown Advisory Maryland Bond Fund (Prospectus Summary) | Brown Advisory Maryland Bond Fund
 
Risk/Return:rr_RiskReturnAbstract 
Risk/Return, Headingrr_RiskReturnHeadingBrown Advisory Maryland Bond Fund
Investment Objective, Headingrr_ObjectiveHeadingInvestment Objective
investment Objective, Primaryrr_ObjectivePrimaryTextBlock
The Brown Advisory Maryland Bond Fund (the "Fund") seeks to provide a high level
of current income exempt from both Federal and Maryland State income taxes
without undue risk.
Expense, Headingrr_ExpenseHeadingFees and Expenses
Expense, Narrativerr_ExpenseNarrativeTextBlock
The following table describes the fees and expenses that you may pay if you buy
and hold shares of the Fund.
Shareholder Fees, Captionrr_ShareholderFeesCaptionShareholder Fees (fees paid directly from your investment)
Operating Expenses, Captionrr_OperatingExpensesCaptionAnnual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover, Headingrr_PortfolioTurnoverHeadingPortfolio Turnover
Portfolio Turnoverrr_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 ended June 30, 2011, the
portfolio turnover rate for the Fund was 29% of the average value of its
portfolio.
Portfolio Turnover, Raterr_PortfolioTurnoverRate29.00%
Expenses, Not Correlated to Ratio Due to Acquired Fund Feesrr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFeesThe Total Annual Fund Operating Expenses do not correlate to the Ratios to Average Net Assets - Net Expenses provided in the Financial Highlights Section of the Prospectus, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.
Expense Example, Headingrr_ExpenseExampleHeadingExample
Expense Example, Narrativerr_ExpenseExampleNarrativeTextBlock
The example below is intended to help you compare the cost of investing in the
Fund with the cost of investing in other mutual funds. This 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 each period. The example also assumes that your
investment has a 5% annual return each year and that the Fund's operating
expenses remain the same.
Expense Example, By Year, Captionrr_ExpenseExampleByYearCaptionAlthough your actual costs may be higher or lower, based on these assumptions your costs would be:
Investment Strategy, Headingrr_StrategyHeadingPrincipal Investment Strategies
Investment Strategy, Narrativerr_StrategyNarrativeTextBlock
Under normal conditions, Brown Investment Advisory Incorporated (the "Advisor")
seeks to achieve the Fund's investment objective by investing at least 80% of
the value of its net assets (plus borrowings for investment purposes) in
Maryland bonds, including bonds issued on behalf of the State of Maryland, its
local governments and public financing authorities. The Fund may also invest in
municipal securities issued by other states, U.S. territories, and possessions,
U.S. Government securities, general obligation securities and revenue
securities, including private activity bonds. The Advisor determines which
securities to purchase by first evaluating whether a security falls within the
credit guidelines set for the Fund by reviewing the ratings given by S&P and
Moody's. The Advisor then determines the appropriate maturity date and coupon
choice after analyzing the current and targeted portfolio structure, and whether
or not the issue is fairly priced. The Fund is non-diversified which means that
it may invest a significant portion of its assets in the securities of a single
issuer or small number of issuers. Generally, the average weighted maturity of
the Fund's portfolio securities will be between 4 and 10 years.  Normally, the
Fund will invest at least 80% of the Fund's total assets in securities the
interest of which is exempt from Federal and Maryland State income taxes,
although such interest may be subject to the Federal alternative minimum tax
("AMT"). All capital gains are subject to Federal and state taxes in addition to
AMT. Municipal securities include municipal bonds, notes, and leases. Municipal
leases are securities that permit government issuers to acquire property and
equipment without the security being subject to constitutional and statutory
requirements for the issuance of long-term fixed income securities.

The Advisor may sell a fixed income security or reduce its position if:
   ·  Revised economic forecasts or interest rate outlook requires a repositioning
      of the portfolio;

   ·  The security subsequently fails to meet the investment criteria;

   ·  A more attractive security is found; or

   ·  The Advisor believes that the security has reached it appreciated potential.

In order to respond to adverse market, economic, political or other conditions,
the Fund may assume a temporary defensive position that is inconsistent with its
principal investment strategies and invest, without limitation, in cash or tax
exempt quality cash equivalents.
Risk, Headingrr_RiskHeadingPrincipal Investment Risks
Risk, Narrativerr_RiskNarrativeTextBlock
As with all mutual funds, there is the risk that you could lose all or a portion
of your investment in the Fund. 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. The following are the principal
risks that could affect the value of your investment:

·  Credit Risk. The value of your investment in the Fund may change in response
   to changes in the credit ratings of the Fund's portfolio securities.
   Generally, investment risk and price volatility increase as a security's
   credit rating declines.

·  Debt/Fixed Income Securities Risk. An increase in interest rates typically
   causes a fall in the value of the debt securities in which the Fund may
   invest. The value of your investment in the Fund may change in response to
   changes in the credit ratings of the Fund's portfolio of debt securities.
   Securities rated below investment grade ("junk bonds") are subject to greater
   risk of loss of your money than higher rated securities. Issuers may
   (increase) decrease prepayments of principal when interest rates (fall)
   increase, affecting the maturity of the debt security and causing the value of
   the security to decline.

·  Interest Rate Risk. An increase in interest rates typically causes a fall in
   the value of the fixed income securities in which the Fund may invest.

·  Liquidity Risk. Certain fixed income securities held by the Fund may be
   difficult (or impossible) to sell at the time and at the price the Advisor
   would like. As a result, the Fund may have to hold these securities longer
   than it would like and may forego other investment opportunities. There is the
   possibility that the Fund may lose money or be prevented from realizing
   capital gains if it cannot sell a security at a particular time and price.

·  Management Risk. The Fund may not meet its investment objective based on the
   Advisor's success or failure to implement investment strategies for the Fund.

·  Maryland Bonds and Municipal Securities Risk. Adverse economic or political
   factors in Maryland will affect the Fund's NAV more than if the Fund invested
   in more geographically diverse investments.

·  Non-Diversification Risk. Investment by the Fund in securities of a limited
   number of issuers exposes it to greater market risk and potential monetary
   losses than if its assets were diversified among the securities of a greater
   number of issuers.
Risk, Lose Moneyrr_RiskLoseMoneyAs with all mutual funds, there is the risk that you could lose all or a portion of your investment in the Fund.
Risk, Nondiversified Statusrr_RiskNondiversifiedStatusInvestment by the Fund in securities of a limited number of issuers exposes it to greater market risk and potential monetary losses than if its assets were diversified among the securities of a greater number of issuers.
Risk, Not Insured Depository Institutionrr_RiskNotInsuredDepositoryInstitutionAn 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, Headingrr_BarChartAndPerformanceTableHeadingPerformance Information
Performance, Narrativerr_PerformanceNarrativeTextBlock
The following performance information provides some indication of the risks of
investing in the Fund. The chart shows changes in the Fund's performance of
Institutional Shares from year-to-year. The table shows how the average annual
returns of Institutional Shares for 1 and 5 years and since inception periods
compare to a broad-based market index.

Effective April 12, 2010, the Brown Advisory Maryland Bond Fund, a series of
Forum Funds (the "Predecessor Fund") reorganized into the Fund, which is a
series of Professionally Managed Portfolios. Performance shown prior to
April 12, 2010 is that of the Predecessor Fund.

Performance information represents only past performance, before and after
taxes, and does not necessarily indicate future results. Updated performance
information is available online at www.brownadvisoryfunds.com or by calling
800-540-6807 (toll free).
Performance, Information Illustrates Variability of Returnsrr_PerformanceInformationIllustratesVariabilityOfReturnsThe following performance information provides some indication of the risks of investing in the Fund. The chart shows changes in the Fund's performance of Institutional Shares from year-to-year. The table shows how the average annual returns of Institutional Shares for 1 and 5 years and since inception periods compare to a broad-based market index.
Performance, Availability Phone Numberrr_PerformanceAvailabilityPhone800-540-6807
Performance, Availability Website Addressrr_PerformanceAvailabilityWebSiteAddresswww.brownadvisoryfunds.com
Performance, Past Does Not Indicate Futurerr_PerformancePastDoesNotIndicateFuturePerformance information represents only past performance, before and after taxes, and does not necessarily indicate future results.
Bar Chart, Headingrr_BarChartHeadingBrown Advisory Maryland Bond Fund - Institutional Shares Calendar Year Total Returns
Bar Chart, Closingrr_BarChartClosingTextBlock
The Fund's calendar year-to-date total return as of September 30, 2011 was
1.78%. During the periods shown in the chart, the highest quarterly return was
4.07% (for the quarter ended June 30, 2002) and the lowest quarterly return was
-2.03% (for the quarter ended June 30, 2004).
Index No Deduction for Fees, Expenses, Taxesrr_IndexNoDeductionForFeesExpensesTaxesreflects no deduction for fees, expenses or taxes
Performance Table, Uses Highest Federal Raterr_PerformanceTableUsesHighestFederalRateAfter-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 Deferredrr_PerformanceTableNotRelevantToTaxDeferredActual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.
Performance Table, Explanation after Tax Higherrr_PerformanceTableExplanationAfterTaxHigherThe "Return After Taxes on Distributions and Sale of Fund Shares" may be higher than other return figures because when a capital loss occurs upon redemption of Fund shares, a tax deduction is provided that benefits the investor.
Performance Table, Closingrr_PerformanceTableClosingTextBlock
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. After-tax returns shown are not relevant to investors
who hold their Fund shares through tax-deferred arrangements such as 401(k)
plans or individual retirement accounts. The "Return After Taxes on
Distributions and Sale of Fund Shares" may be higher than other return figures
because when a capital loss occurs upon redemption of Fund shares, a tax
deduction is provided that benefits the investor.
Average Annual Returns, Captionrr_AverageAnnualReturnCaptionBrown Advisory Maryland Bond Fund Average Annual Total Returns For the period ended December 31, 2010
Brown Advisory Maryland Bond Fund (Prospectus Summary) | Brown Advisory Maryland Bond Fund | Institutional Shares
 
Risk/Return:rr_RiskReturnAbstract 
Year to Date Return, Labelrr_YearToDateReturnLabelyear-to-date total return
Bar Chart, Year to Date Return, Daterr_BarChartYearToDateReturnDateSep. 30, 2011
Bar Chart, Year to Date Returnrr_BarChartYearToDateReturn1.78%
Highest Quarterly Return, Labelrr_HighestQuarterlyReturnLabelhighest quarterly return
Highest Quarterly Return, Daterr_BarChartHighestQuarterlyReturnDateJun. 30, 2002
Highest Quarterly Returnrr_BarChartHighestQuarterlyReturn4.07%
Lowest Quarterly Return, Labelrr_LowestQuarterlyReturnLabellowest quarterly return
Lowest Quarterly Return, Daterr_BarChartLowestQuarterlyReturnDateJun. 30, 2004
Lowest Quarterly Returnrr_BarChartLowestQuarterlyReturn(2.03%)
Brown Advisory Maryland Bond Fund | Barclays 1-10 Year Blended Municipal Bond Index
 
Risk/Return:rr_RiskReturnAbstract 
Average Annual Returns, Labelrr_AverageAnnualReturnLabelBarclays 1-10 Year Blended Municipal Bond Index (reflects no deduction for fees, expenses or taxes)
Average Annual Returns, 1 Yearrr_AverageAnnualReturnYear013.13%
Average Annual Returns, 5 Yearsrr_AverageAnnualReturnYear054.60%
Average Annual Returns, Since Inceptionrr_AverageAnnualReturnSinceInception4.61%
Average Annual Returns, Inception Daterr_AverageAnnualReturnInceptionDateDec. 21, 2000
Brown Advisory Maryland Bond Fund | Institutional Shares
 
Risk/Return:rr_RiskReturnAbstract 
Maximum Sales Charge (Load) imposed on Purchases (as a % of the offering price)rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) imposed on Redemptions (as a % of the sale price)rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee (as a % of amount redeemed within 14 days of purchase)rr_RedemptionFeeOverRedemption(1.00%)
Exchange Fee ( as a % amount exchanged within 14 days of purchase)rr_ExchangeFeeOverRedemption1.00%
Management Feesrr_ManagementFeesOverAssets0.35%
Distribution and/or Service (12b-1) Feesrr_DistributionAndService12b1FeesOverAssets none
Other Expensesrr_OtherExpensesOverAssets0.16%
Acquired Fund Fees and Expensesrr_AcquiredFundFeesAndExpensesOverAssets0.01%
Total Annual Fund Operating Expensesrr_ExpensesOverAssets0.52%[1]
Expense Example, With Redemption, 1 Yearrr_ExpenseExampleYear01 53
Expense Example, With Redemption, 3 Yearsrr_ExpenseExampleYear03167
Expense Example, With Redemption, 5 Yearsrr_ExpenseExampleYear05291
Expense Example, With Redemption, 10 Yearsrr_ExpenseExampleYear10 653
Annual Return 2001rr_AnnualReturn20014.78%
Annual Return 2002rr_AnnualReturn20028.99%
Annual Return 2003rr_AnnualReturn20033.41%
Annual Return 2004rr_AnnualReturn20042.17%
Annual Return 2005rr_AnnualReturn20050.66%
Annual Return 2006rr_AnnualReturn20062.85%
Annual Return 2007rr_AnnualReturn20073.68%
Annual Return 2008rr_AnnualReturn20082.74%
Annual Return 2009rr_AnnualReturn20096.50%
Annual Return 2010rr_AnnualReturn20102.28%
Average Annual Returns, Labelrr_AverageAnnualReturnLabelReturn Before Taxes
Average Annual Returns, 1 Yearrr_AverageAnnualReturnYear012.28%
Average Annual Returns, 5 Yearsrr_AverageAnnualReturnYear053.60%
Average Annual Returns, Since Inceptionrr_AverageAnnualReturnSinceInception3.81%
Average Annual Returns, Inception Daterr_AverageAnnualReturnInceptionDateDec. 21, 2000
Brown Advisory Maryland Bond Fund | Institutional Shares | After Taxes on Distributions
 
Risk/Return:rr_RiskReturnAbstract 
Average Annual Returns, Labelrr_AverageAnnualReturnLabelReturn After Taxes on Distributions
Average Annual Returns, 1 Yearrr_AverageAnnualReturnYear012.28%
Average Annual Returns, 5 Yearsrr_AverageAnnualReturnYear053.60%
Average Annual Returns, Since Inceptionrr_AverageAnnualReturnSinceInception3.81%
Average Annual Returns, Inception Daterr_AverageAnnualReturnInceptionDateDec. 21, 2000
Brown Advisory Maryland Bond Fund | Institutional Shares | After Taxes on Distributions and Sales
 
Risk/Return:rr_RiskReturnAbstract 
Average Annual Returns, Labelrr_AverageAnnualReturnLabelReturn After Taxes on Distributions and Sale of Fund Shares
Average Annual Returns, 1 Yearrr_AverageAnnualReturnYear012.32%
Average Annual Returns, 5 Yearsrr_AverageAnnualReturnYear053.51%
Average Annual Returns, Since Inceptionrr_AverageAnnualReturnSinceInception3.73%
Average Annual Returns, Inception Daterr_AverageAnnualReturnInceptionDateDec. 21, 2000
[1]The Total Annual Fund Operating Expenses do not correlate to the Ratios to Average Net Assets - Net Expenses provided in the Financial Highlights Section of the Prospectus, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.