Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Oct. 31, 2011
Brown Advisory Flexible Value Fund (Prospectus Summary) | Brown Advisory Flexible Value Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return, Heading	rr_RiskReturnHeading	Brown Advisory Flexible Value Fund
Investment Objective, Heading	rr_ObjectiveHeading	Investment Objective
investment Objective, Primary	rr_ObjectivePrimaryTextBlock	The Brown Advisory Flexible Value Fund (the "Fund") seeks to achieve long-term growth of capital.
Expense, Heading	rr_ExpenseHeading	Fees and Expenses
Expense, Narrative	rr_ExpenseNarrativeTextBlock	The following table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.
Shareholder Fees, Caption	rr_ShareholderFeesCaption	Shareholder Fees (fees paid directly from your investment)
Operating Expenses, Caption	rr_OperatingExpensesCaption	Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover, Heading	rr_PortfolioTurnoverHeading	Portfolio Turnover
Portfolio Turnover	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 ended June 30, 2011, the portfolio turnover rate for the Fund was 33% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	33.00%
Expenses, Not Correlated to Ratio Due to Acquired Fund Fees	rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees	The Total Annual Fund Operating Expenses after Fee Waiver and Expense Reimbursement 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, Heading	rr_ExpenseExampleHeading	Example
Expense Example, Narrative	rr_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 (taking into account the contractual expense limitation for 2 years).
Expense Example, By Year, Caption	rr_ExpenseExampleByYearCaption	Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Investment Strategy, Heading	rr_StrategyHeading	Principal Investment Strategies
Investment Strategy, Narrative	rr_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 a diversified portfolio of equity securities. The Advisor may invest in securities of companies of various market capitalizations with a focus on larger companies. Medium and large market capitalization companies are, according to the Advisor, those companies with market capitalizations generally greater than $2 billion at the time of purchase. Equity securities include domestic and foreign common and preferred stock, convertible debt securities, American Depositary Receipts ("ADRs"), real estate investment trusts ("REITs") and exchange traded funds ("ETFs"). The Advisor may also invest in private placements in these types of securities. The Fund invests primarily in ETFs that have an investment objective similar to the Fund's or that otherwise are permitted investments with the Fund's investment policies described herein. ADRs are equity securities traded on U.S. securities exchanges, which are generally issued by banks or trust companies to evidence ownership of foreign equity securities. The Advisor may also invest in debt-securities, including lower-rated debt-securities and foreign securities including depositary receipts. The Advisor follows an investment philosophy referred to as "flexible value." The "flexible value" strategy expands the bargain hunting concepts of value investing to a broad range of opportunities. Rather than label securities as value or growth, the Advisor believes that growth is an integral part of the value equation; therefore, the Advisor may invest in traditional value securities as well as securities of companies with better growth rates, or other characteristics that are traditionally associated with value securities. The Advisor seeks to invest in the common stocks of companies it believes are undervalued in the marketplace based on characteristics such as earnings, dividends, cash flow or asset values. Other factors considered include: · Financial condition of the company · Micro and macroeconomic changes likely to improve the long-term business performance of the company · Competitive positioning of the company within its industry; and · The quality of management and management's focus on creating shareholder value. With respect to 20% of its assets, the Fund may invest in (1) investment grade and non-investment grade debt securities, including with respect to 10% of its assets, non-investment grade securities rated BB (or lower)/Ba (or lower) ("junk bonds"), by Standard & Poor's ("S&P") or Moody's Investor Services ("Moody's"), respectively, or (2) unrated debt securities determined by the Advisor to be of comparable quality. The Advisor may sell a security or reduce its position if: · The security has reached a price whereby its risk/reward characteristics are not as favorable; · A company's fundamentals are deteriorating to the point where the original investment thesis for owning the stock is no longer intact; or · A better opportunity has been identified. In order to respond to adverse market, economical, 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 prime quality cash equivalents.
Risk, Heading	rr_RiskHeading	Principal Investment Risks
Risk, Narrative	rr_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: · Convertible Securities Risk. The value of convertible securities tends to decline as interest rates rise and, because of the conversion feature, tends to vary with fluctuations in the market value of the underlying securities. · 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 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. · Equity and General Market Risk. Common stocks are susceptible to general stock market fluctuations and to volatile increases and decreases in value. The stock market may experience declines or stocks in the Fund's portfolio may not increase their earnings at the rate anticipated. The Fund's NAV and investment return will fluctuate based upon changes in the value of its portfolio securities. · ETF Risk. ETFs may trade at a discount to the aggregate value of the underlying securities and although expense ratios for ETFs are generally low, frequent trading of ETFs by the Fund can generate brokerage expenses. Shareholders of the Fund will indirectly be subject to the fees and expenses of the individual ETFs in which the Fund invests. · Foreign Securities Risk. Foreign securities, including ADRs, are subject to additional risks including international trade, currency, political, regulatory and diplomatic risks. · 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. · Non-Investment Grade Securities Risk. Securities rated below investment grade, i.e., BA or BB and lower ("junk bonds"), are subject to greater risks of loss of your money than higher rated securities. Compared with issuers of investment grade fixed-income securities, junk bonds are more likely to encounter financial difficulties and to be materially affected by these difficulties. · Private Placement Risk. The Fund may invest in privately issued securities of domestic common and preferred stock, convertible debt securities, ADRs, REITs and ETFs, including those which may be resold only in accordance with Rule 144A under the Securities Act of 1933, as amended ("1933 Act"). Privately issued securities are restricted securities that are not publicly traded. Delay or difficulty in selling such securities may result in a loss to the Fund. · REIT and Real Estate Risk. The value of the Fund's investments in REITs may change in response to changes in the real estate market such as declines in the value of real estate, lack of available capital or financing opportunities, and increases in property taxes or operating costs. · Smaller and Medium Capitalization Company Risk. Securities of smaller and medium-sized companies may be more volatile and more difficult to liquidate during market down turns than securities of larger companies. Additionally the price of smaller companies may decline more in response to selling pressures. · Value Company Risk. The stock of value companies can continue to be undervalued for long periods of time and not realize its expected value. The value of the Fund may decrease in response to the activities and financial prospects of an individual company.
Risk, Lose Money	rr_RiskLoseMoney	As with all mutual funds, there is the risk that you could lose all or a portion of your investment in the Fund.
Risk, Not Insured Depository Institution	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	Performance Information
Performance, Narrative	rr_PerformanceNarrativeTextBlock	The following performance information provides some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund's performance of Institutional Shares from year-to-year. The table shows how the average annual returns of the Institutional Shares and Advisor Shares for 1 year and since inception periods compare to a broad-based market index. Effective April 12, 2010, the Brown Advisory Flexible Value 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 Returns	rr_PerformanceInformationIllustratesVariabilityOfReturns	The following performance information provides some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund's performance of Institutional Shares from year-to-year. The table shows how the average annual returns of the Institutional Shares and Advisor Shares for 1 year and since inception periods compare to a broad-based market index.
Performance, Availability Phone Number	rr_PerformanceAvailabilityPhone	800-540-6807 (toll free)
Performance, Availability Website Address	rr_PerformanceAvailabilityWebSiteAddress	www.brownadvisoryfunds.com
Bar Chart, Heading	rr_BarChartHeading	Brown Advisory Flexible Value Fund - Institutional Shares Calendar Year Total Returns
Bar Chart, Closing	rr_BarChartClosingTextBlock	The Fund's calendar year-to-date total return as of September 30, 2011 was -13.43%. During the periods shown in the chart, the highest quarterly return was 17.44% (for the quarter ended June 30, 2009) and the lowest quarterly return was -23.94% (for the quarter ended December 31, 2008).
Index No Deduction for Fees, Expenses, Taxes	rr_IndexNoDeductionForFeesExpensesTaxes	reflects no deduction for fees, expenses and taxes
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	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, One Class of after Tax Shown	rr_PerformanceTableOneClassOfAfterTaxShown	Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns are shown for Institutional Shares only. After-tax returns for Advisor Shares will vary.
Performance Table, Explanation after Tax Higher	rr_PerformanceTableExplanationAfterTaxHigher	The "Return After Taxes on Distributions and Sale of Fund Shares" may be higher than other figures because when a capital loss occurs upon redemption of Fund Shares, a tax deduction is provided that benefits the investor.
Performance Table, Footnotes	rr_PerformanceTableFootnotesTextBlock	NOTE: Institutional Shares of the Flexible Value Fund commenced operations on November 30, 2006 as part of the Predecessor Flexible Value Fund. Advisor Shares commenced operations on January 24, 2007 as part of the Predecessor Flexible Value Fund. Performance shown prior to inception of the Advisor Shares is based on the performance of Institutional Shares, adjusted for the higher expenses applicable to Advisor Shares. Prior to July 1, 2011, the Advisor Shares were known as A Shares.
Performance Table, Closing	rr_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. After-tax returns are shown for Institutional Shares only. After-tax returns for Advisor Shares will vary. The "Return After Taxes on Distributions and Sale of Fund Shares" may be higher than other figures because when a capital loss occurs upon redemption of Fund Shares, a tax deduction is provided that benefits the investor.
Average Annual Returns, Caption	rr_AverageAnnualReturnCaption	Brown Advisory Flexible Value Fund Average Annual Total Returns For the period ended December 31, 2010
Brown Advisory Flexible Value Fund (Prospectus Summary) | Brown Advisory Flexible Value Fund | Institutional Shares
Risk/Return:	rr_RiskReturnAbstract
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2012-10-31
Year to Date Return, Label	rr_YearToDateReturnLabel	year-to-date total return
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2011
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	(13.43%)
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	highest quarterly return
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	17.44%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	lowest quarterly return
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(23.94%)
Brown Advisory Flexible Value Fund (Prospectus Summary) | Brown Advisory Flexible Value Fund | Advisor Shares
Risk/Return:	rr_RiskReturnAbstract
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2012-10-31
Brown Advisory Flexible Value Fund | S&P 500® Index
Risk/Return:	rr_RiskReturnAbstract
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	S&P 500® Index (reflects no deduction for fees, expenses and taxes)
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	15.06%
Average Annual Returns, Since Inception	rr_AverageAnnualReturnSinceInception	(0.48%)
Brown Advisory Flexible Value 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_ExchangeFeeOverRedemption	1.00%
Management Fees	rr_ManagementFeesOverAssets	0.85%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses	rr_OtherExpensesOverAssets	0.47%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.33%
Fee Waiver and Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.17%)
Total Annual Fund Operating Expenses after Fee Waiver and Expense Reimbursement	rr_NetExpensesOverAssets	1.16%	[1],[2]
Expense Example, With Redemption, 1 Year	rr_ExpenseExampleYear01	118
Expense Example, With Redemption, 3 Years	rr_ExpenseExampleYear03	405
Expense Example, With Redemption, 5 Years	rr_ExpenseExampleYear05	713
Expense Example, With Redemption, 10 Years	rr_ExpenseExampleYear10	1,587
Annual Return 2007	rr_AnnualReturn2007	(7.50%)
Annual Return 2008	rr_AnnualReturn2008	(40.03%)
Annual Return 2009	rr_AnnualReturn2009	40.83%
Annual Return 2010	rr_AnnualReturn2010	10.86%
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Institutional Shares Return Before Taxes
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	10.86%
Average Annual Returns, Since Inception	rr_AverageAnnualReturnSinceInception	(2.96%)
Brown Advisory Flexible Value Fund | Institutional Shares | After Taxes on Distributions
Risk/Return:	rr_RiskReturnAbstract
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Institutional Shares Return After Taxes on Distributions
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	10.78%
Average Annual Returns, Since Inception	rr_AverageAnnualReturnSinceInception	(3.08%)
Brown Advisory Flexible Value Fund | Institutional Shares | After Taxes on Distributions and Sales
Risk/Return:	rr_RiskReturnAbstract
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Institutional Shares Return After Taxes on Distributions and Sale of Fund Shares
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	7.15%
Average Annual Returns, Since Inception	rr_AverageAnnualReturnSinceInception	(2.55%)
Brown Advisory Flexible Value Fund | Advisor 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_ExchangeFeeOverRedemption	1.00%
Management Fees	rr_ManagementFeesOverAssets	0.85%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other Expenses	rr_OtherExpensesOverAssets	0.43%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.54%
Fee Waiver and Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.18%)
Total Annual Fund Operating Expenses after Fee Waiver and Expense Reimbursement	rr_NetExpensesOverAssets	1.36%	[1],[2]
Expense Example, With Redemption, 1 Year	rr_ExpenseExampleYear01	138
Expense Example, With Redemption, 3 Years	rr_ExpenseExampleYear03	469
Expense Example, With Redemption, 5 Years	rr_ExpenseExampleYear05	822
Expense Example, With Redemption, 10 Years	rr_ExpenseExampleYear10	1,819
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Advisor Shares Return Before Taxes
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	10.70%
Average Annual Returns, Since Inception	rr_AverageAnnualReturnSinceInception	(3.26%)

[1] The Advisor has contractually agreed to waive its fees and reimburse certain expenses (excluding taxes, interest, portfolio transaction expenses, acquired fund fees and expenses and extraordinary expenses) to limit Total Annual Fund Operating Expenses for Institutional Shares and Advisor Shares to 1.15% and 1.35%, respectively, of the Fund's average daily net assets through October 31, 2012. The contractual waivers and expense reimbursements may be changed or eliminated at any time after October 31, 2012 by the Board of Trustees upon 60 days notice to the Advisor, or by the Advisor with the consent of the Board of Trustees.

[2] The Total Annual Fund Operating Expenses after Fee Waiver and Expense Reimbursement 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.