XML 15 R15.htm IDEA: XBRL DOCUMENT v2.4.0.6
Label Element Value
Risk Return [Abstract] rr_RiskReturnAbstract  
ProspectusDate rr_ProspectusDate Jan. 28, 2012
Chase Mid-Cap Growth Fund (Prospectus Summary) | Chase Mid-Cap Growth Fund
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Risk/Return, Heading rr_RiskReturnHeading Chase Mid-Cap Growth Fund (the "Mid-Cap Fund" or "Fund")
Investment Objective, Heading rr_ObjectiveHeading Investment Objective
investment Objective, Primary rr_ObjectivePrimaryTextBlock 
The Mid-Cap Fund's investment objective is to achieve capital appreciation.
Expense, Heading rr_ExpenseHeading Fees and Expenses of the Fund
Expense, Narrative rr_ExpenseNarrativeTextBlock 
This table describes the fees and expenses that you may pay if you buy and hold
shares of the Mid-Cap 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 Mid-Cap 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 158.88% of the average value of itsportfolio.
Other Expenses, New Fund, Based on Estimates rr_OtherExpensesNewFundBasedOnEstimates Other expenses are estimated based upon the addition of a new class of shares - Institutional Class.
Expense Example, Heading rr_ExpenseExampleHeading Example
Expense Example, Narrative rr_ExpenseExampleNarrativeTextBlock 
The Example is intended to help you compare the cost of investing in the Mid-Cap
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 (taking into account the Expense Caps only in the first
year). 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 market conditions, the Mid-Cap Fund invests at least 80% of its net
assets, plus any borrowings for investment purposes, in the equity securities of
companies with medium market capitalizations (a "mid-cap company"). This policy
may only be changed upon sixty (60) days' prior notice to shareholders. The
Advisor generally considers a mid-cap company to be one that has a market
capitalization of between $1 billion and $15 billion. Mid-cap company stocks the
Advisor purchases for the Fund typically have earnings growth in excess of 10%
per year on a historical basis, and have demonstrated consistency of earnings
growth over time. In addition, the Fund may invest a portion of its assets in
non-U.S. issuers through the use of depositary receipts, such as ADRs.

In buying and selling portfolio securities, the Advisor first screens companies
for 10% or greater earnings growth over the last five years, consistency of
earnings, and liquidity. The Advisor then screens the stocks for fundamental and
technical characteristics, including earnings growth, return on equity,
reinvestment rate, debt level, preliminary valuation analysis, relative
strength, price momentum, price volatility, unusual volume patterns, and insider
transactions. The Advisor then conducts traditional fundamental security
analysis to identify the most attractive buys for the Fund. The Advisor
continuously reviews prices and adjusts its targets in response to changes in
stock characteristics, setting buy/sell target prices for each stock. The
existence of alternative securities that the Advisor considers to be more
attractive is an added consideration in deciding whether to sell portfolio
securities.

The Advisor expects that the Fund's investment strategy may result in a
portfolio turnover rate in excess of 100% on an annual basis.
Risk, Heading rr_RiskHeading Principal Investment Risks
Risk, Narrative rr_RiskNarrativeTextBlock 
Losing a portion or all of your investment is a risk of investing in the Mid-Cap
Fund. The following additional risks could affect the value of your investment:

o Management Risk - Mid-Cap Fund's ability to achieve its investment objective
  depends on the Advisor's ability to correctly identify economic trends and
  select stocks, particularly in volatile stock markets.

o Market Risk - The value of stocks and other securities the Mid-Cap Fund holds
  or the overall stock market may decline over short or extended periods.

o Medium-Sized Company Risk - A mid-cap company may be more vulnerable to adverse
  business or economic events than stocks of larger companies. These stocks
  present greater risks than securities of larger, more diversified companies.

o Non-U.S. Security Risk - The Mid-Cap Fund may invest in non-U.S. issuers
  through depositary receipts such as ADRs. Non-U.S. investments may involve
  financial, economic or political risks not ordinarily associated with the
  securities of U.S. issuers.

o  Portfolio Turnover Risk - A high portfolio turnover rate (100% or more) has the
   potential to result in the realization and distribution to shareholders of
   higher capital gains, which may subject you to a higher tax liability.

o  Defensive Position Risk - If the Mid-Cap Fund takes a temporary defensive
   position in response to adverse conditions, the Fund may not achieve its
   investment objective. For example, should the market advance during this
   period, the Fund may not participate as much as it would have if it had been
   more fully invested.

The Mid-Cap Fund may be appropriate for investors who:

o  Have a long-term investment horizon;

o  Want to diversify their investment portfolio by investing in a mutual fund that
   invests in securities of mid-cap companies; and/or

o  Are willing to accept the greater risks of investing in a portfolio with
   significant common stock holdings.
Risk, Lose Money rr_RiskLoseMoney Losing a portion or all of your investment is a risk of investing in the Mid-Cap Fund.
Bar Chart and Performance Table, Heading rr_BarChartAndPerformanceTableHeading Performance
Performance, Narrative rr_PerformanceNarrativeTextBlock 
The following performance information provides some indication of the risks of
investing in the Mid-Cap Fund and reflects the period for which the Advisor was
retained as the Fund's investment advisor (including a period during which the
Fund was organized as a different mutual fund) by showing changes in the Fund's
performance from year to year since retention of the Advisor and by showing how
the Fund's average annual returns for 1 and 5 years and since retention of the
Advisor compare with those of a broad measure of market performance and an index
that reflects the Lipper category applicable to the Fund. The Fund's past
performance, before and after taxes, is not necessarily an indication of how the
Fund will perform in the future. Updated performance information is available on
the Fund's website at www.chasegrowthfunds.com or by calling the Fund toll-free
at 1-888-861-7556.
Performance, Information Illustrates Variability of Returns rr_PerformanceInformationIllustratesVariabilityOfReturns The following performance information provides some indication of the risks of investing in the Mid-Cap Fund and reflects the period for which the Advisor was retained as the Fund's investment advisor (including a period during which the Fund was organized as a different mutual fund) by showing changes in the Fund's performance from year to year since retention of the Advisor and by showing how the Fund's average annual returns for 1 and 5 years and since retention of the Advisor compare with those of a broad measure of market performance and an index that reflects the Lipper category applicable to the Fund.
Performance, Availability Phone Number rr_PerformanceAvailabilityPhone 1-888-861-7556
Performance, Availability Website Address rr_PerformanceAvailabilityWebSiteAddress www.chasegrowthfunds.com
Performance, Past Does Not Indicate Future rr_PerformancePastDoesNotIndicateFuture The Fund's 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 Class N - Calendar Year Total Returns as of December 31
Bar Chart, Closing rr_BarChartClosingTextBlock 
During the period of time shown in the bar chart, the highest return for a
calendar quarter was 14.26% (quarter ended 12/31/2010) and the lowest return
for a calendar quarter was -25.32% (quarter ended 12/31/2008).
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes reflects no deduction for fees, expenses or 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 Actual after-tax returns depend on your tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements such as 401(k) plans or IRAs.
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 your tax situation and may differ from
those shown, and the after-tax returns shown are not relevant to investors who
hold their fund shares through tax-deferred arrangements such as 401(k) plans or
IRAs.
Average Annual Returns, Caption rr_AverageAnnualReturnCaption Average Annual Total Returns (for the periods ended December 31, 2011)
Chase Mid-Cap Growth Fund (Prospectus Summary) | Chase Mid-Cap Growth Fund | Russell Midcap ® Growth Index
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Average Annual Returns, Label rr_AverageAnnualReturnLabel Russell Midcap® Growth Index (reflects no deduction for fees, expenses or taxes)
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (1.65%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 2.44%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 9.42%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Sep. 01, 2002 [1]
Chase Mid-Cap Growth Fund (Prospectus Summary) | Chase Mid-Cap Growth Fund | Lipper Mid-Cap Growth Funds Index
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Average Annual Returns, Label rr_AverageAnnualReturnLabel Lipper Mid-Cap Growth Funds Index (reflects no deduction for taxes)
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (5.30%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 2.89%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 8.43%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Sep. 01, 2002 [1]
Chase Mid-Cap Growth Fund (Prospectus Summary) | Chase Mid-Cap Growth Fund | Class N
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Redemption Fees (as a percentage of amount redeemed on shares held for 60 days or less) rr_RedemptionFeeOverRedemption (2.00%)
Management Fees rr_ManagementFeesOverAssets 0.75%
Shareholder Servicing Plan Fees rr_Component1OtherExpensesOverAssets 0.25%
Other Expenses (includes Shareholder Servicing Plan Fees) rr_OtherExpensesOverAssets 1.25% [2]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.00%
Less: Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.52%) [3]
Net Annual Fund Operating Expenses rr_NetExpensesOverAssets 1.48%
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination 2013-01-28
Expense Example, With Redemption, 1 Year rr_ExpenseExampleYear01 151
Expense Example, With Redemption, 3 Years rr_ExpenseExampleYear03 577
Expense Example, With Redemption, 5 Years rr_ExpenseExampleYear05 1,030
Expense Example, With Redemption, 10 Years rr_ExpenseExampleYear10 2,286
Annual Return 2003 rr_AnnualReturn2003 18.50%
Annual Return 2004 rr_AnnualReturn2004 20.97%
Annual Return 2005 rr_AnnualReturn2005 15.33%
Annual Return 2006 rr_AnnualReturn2006 1.66%
Annual Return 2007 rr_AnnualReturn2007 19.74%
Annual Return 2008 rr_AnnualReturn2008 (39.65%)
Annual Return 2009 rr_AnnualReturn2009 26.83%
Annual Return 2010 rr_AnnualReturn2010 25.14%
Annual Return 2011 rr_AnnualReturn2011 9.01%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel highest return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2010
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 14.26%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel lowest return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (25.32%)
Average Annual Returns, Label rr_AverageAnnualReturnLabel Return Before Taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 9.01%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 4.57%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 7.64%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Sep. 01, 2002 [1]
Chase Mid-Cap Growth Fund (Prospectus Summary) | Chase Mid-Cap Growth Fund | Class N | After Taxes on Distributions
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Average Annual Returns, Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 9.01%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 4.47%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 7.40%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Sep. 01, 2002 [1]
Chase Mid-Cap Growth Fund (Prospectus Summary) | Chase Mid-Cap Growth Fund | Class N | After Taxes on Distributions and Sales
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Average Annual Returns, Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 5.86%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 3.93%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 6.72%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Sep. 01, 2002 [1]
Chase Mid-Cap Growth Fund (Prospectus Summary) | Chase Mid-Cap Growth Fund | Institutional Class
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Redemption Fees (as a percentage of amount redeemed on shares held for 60 days or less) rr_RedemptionFeeOverRedemption (2.00%)
Management Fees rr_ManagementFeesOverAssets 0.75%
Shareholder Servicing Plan Fees rr_Component1OtherExpensesOverAssets none
Other Expenses (includes Shareholder Servicing Plan Fees) rr_OtherExpensesOverAssets 1.00% [2]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.75%
Less: Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.52%) [3]
Net Annual Fund Operating Expenses rr_NetExpensesOverAssets 1.23%
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination 2013-01-28
Expense Example, With Redemption, 1 Year rr_ExpenseExampleYear01 125
Expense Example, With Redemption, 3 Years rr_ExpenseExampleYear03 500
Expense Example, With Redemption, 5 Years rr_ExpenseExampleYear05 900
Expense Example, With Redemption, 10 Years rr_ExpenseExampleYear10 2,019
[1] Prior to September 1, 2002, the Predecessor Mid-Cap Fund was advised by a different investment advisor. Performance from January 1, 2001, the inception date of the Predecessor Mid-Cap Fund, to August 31, 2002, is not shown. Performance shown for Class N begins on September 1, 2002. The Institutional Class incepted on January 28, 2012; therefore, performance is not available at this time.
[2] Other expenses are estimated based upon the addition of a new class of shares - Institutional Class.
[3] The Advisor has contractually agreed to waive a portion of its management fees and/or pay Fund expenses (excluding aquired fund fees and expenses ("AFFE")), leverage interest, taxes and extraordinary expenses) in order to limit Net Annual Fund Operating Expenses for the Mid-Cap Fund Class N and Institutional Class to 1.48% and 1.23% of the Fund's average daily net assets, respectively (the "Expense Caps"). The Expense Caps will remain in effect through at least January 28, 2013, and may be terminated only by the Board of Trustees (the "Board") of Advisors Series Trust (the "Trust"). The Advisor may request recoupment of previously waived fees and expenses from the Fund for three years from the date they were waived or paid, subject to the Expense Caps.