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Risk/Return: rr_RiskReturnAbstract  
ProspectusDate rr_ProspectusDate Nov. 28, 2011
O'Shaughnessy All Cap Core Fund (Second Prospectus Summary) | O'Shaughnessy All Cap Core Fund
  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return, Heading rr_RiskReturnHeading O'Shaughnessy All Cap Core Fund
Investment Objective, Heading rr_ObjectiveHeading Investment Objective
investment Objective, Primary rr_ObjectivePrimaryTextBlock 
The Fund's investment objective is to seek long-term 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 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, the Fund's portfolio turnover
rate was 44.27% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 44.27%
Expense Example, Heading rr_ExpenseExampleHeading Example
Expense Example, Narrative 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 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 contractual Expense Cap 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 of the Fund
Investment Strategy, Narrative rr_StrategyNarrativeTextBlock 
Under normal market conditions, the Fund invests primarily in a diversified
portfolio of common stocks and other equity securities of companies of all
sizes. The Adviser employs a proprietary quantitatively-driven approach to
security selection based on research and analysis of historical data. The
Adviser screens securities for attractive growth and value characteristics using
a factor-based model. In selecting value securities, the Adviser evaluates
factors that may include, but are not limited to: market capitalization, sales
over the previous twelve months, trading volume and cash flow. In selecting
growth securities, the Adviser evaluates factors that may include, but are not
limited to: market capitalization, trading volume, valuation metrics, earnings
and price momentum over time. The Adviser may eliminate or substitute factors at
its discretion. Portfolio securities may be sold generally upon periodic
rebalancings of the Fund's portfolio. The Adviser considers the same factors it
uses in evaluating a security for purchase and generally sells securities when
it believes such securities no longer meet its investment criteria. The Fund may
from time to time emphasize investment in certain sectors of the market.

The Fund invests primarily in common stocks and other equity securities,
including preferred stocks, convertible securities, rights and warrants to
purchase common stock and depositary receipts. The Fund may invest up to 50% of
its total assets in the securities of foreign issuers, including those in
emerging markets, and may invest up to 10% of its total assets in real estate
investment trusts ("REITs") or foreign real estate companies. The Fund may
invest up to 10% of its total assets in other investment companies, including
exchange-traded funds ("ETFs"). The Fund may purchase and sell certain
derivative instruments, such as options, futures contracts and options on
futures contracts, for various portfolio management purposes and to mitigate
risks. In general terms, a derivative instrument is one whose value depends on
(or is derived from) the value of an underlying asset, interest rate or
index. The Adviser 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 Risks of Investing in the Fund
Risk, Narrative rr_RiskNarrativeTextBlock 
Losing all or a portion of your investment is a risk of investing in the
Fund. The following principal risks could affect the value of your investment:

·    Market Risk and Equity Risk. Market risk is the possibility that the market
     value of securities owned by the Fund will decline. Investments in common
     stocks and other equity securities generally are affected by changes in the
     stock markets, which fluctuate substantially over time, sometimes suddenly
     and sharply. Securities' prices of small- and medium-sized companies often
     fluctuate more and may fall more than the securities' prices of
     larger-sized, more established companies. The values of convertible
     securities tend to decline as interest rates rise and, because of the
     conversion feature, tend to vary with fluctuations in the market value of
     the underlying equity security.

·    Management Risk. The Fund is subject to management risk because it is an
     actively managed portfolio. The Adviser's management practices and
     investment strategies might not work to meet the Fund's investment
     objective.

·    Sector Risk.  To the extent the Fund invests a significant portion of its
     assets in the securities of companies in the same sector of the market, the
     Fund is more susceptible to economic, political, regulatory and other
     occurrences influencing those sectors.

·    Foreign Securities Risk. The risks of investing in the securities of foreign
     issuers, including emerging market issuers and depositary receipts, can
     include fluctuations in foreign currencies, foreign currency exchange
     controls, political and economic instability, differences in securities
     regulation and trading, and foreign taxation issues. These risks are greater
     in emerging markets.

·    REITs and Foreign Real Estate Company Risk. Investing in REITs and foreign
     real estate companies makes the Fund more susceptible to risks associated
     with the ownership of real estate and with the real estate industry in
     general and may involve duplication of management fees and other
     expenses. REITs and foreign real estate companies may be less diversified
     than other pools of securities, may have lower trading volumes and may be
     subject to more abrupt or erratic price movements than the overall
     securities markets.

·    Investment Company Risk. When the Fund invests in an ETF or mutual fund, it
     will bear additional expenses based on its pro rata share of the ETF's or
     mutual fund's operating expenses, including the potential duplication of
     management fees. The risk of owning an ETF or mutual fund generally reflects
     the risks of owning the underlying securities the ETF or mutual fund
     holds. The Fund also will incur brokerage costs when it purchases ETFs.

·    Derivative Transactions Risk. Risks of derivatives include the possible
     imperfect correlation between the value of the instruments and the
     underlying assets; risks of default by the other party to the transaction;
     risks that the transactions may result in losses that partially or
     completely offset gains in portfolio positions; and risks that the
     instruments may not be liquid.

·    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. High portfolio turnover also necessarily results in greater
     transaction costs which may reduce Fund performance.

·    Newer Fund Risk. The Fund is newer with limited operating history and there
     can be no assurance that the Fund will grow to or maintain an economically
     viable size, in which case the Board may determine to liquidate the Fund.
Risk, Lose Money rr_RiskLoseMoney Losing all or a portion of your investment is a risk of investing in the Fund.
Bar Chart and Performance Table, Heading rr_BarChartAndPerformanceTableHeading Performance
Performance, Narrative rr_PerformanceNarrativeTextBlock 
When the Fund has been in operation for a full calendar year, performance
information will be shown here. Updated performance information is available on
the Fund's website at www.osam.com or by calling the Fund toll-free at
1-877-291-7827.
Performance, One Year or Less rr_PerformanceOneYearOrLess When the Fund has been in operation for a full calendar year, performance information will be shown here.
Performance, Availability Phone Number rr_PerformanceAvailabilityPhone 1-877-291-7827
Performance, Availability Website Address rr_PerformanceAvailabilityWebSiteAddress www.osam.com
O'Shaughnessy All Cap Core Fund (Second Prospectus Summary) | O'Shaughnessy All Cap Core Fund | Class I
  
Risk/Return: rr_RiskReturnAbstract  
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination 2012-11-28
O'Shaughnessy All Cap Core Fund | 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) (as a percentage of original purchase price or redemption price, whichever is less) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee (as a percentage of amount redeemed on shares held for 90 days or less) rr_RedemptionFeeOverRedemption (2.00%)
Management Fees rr_ManagementFeesOverAssets 0.55%
Distribution (Rule 12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Shareholder Servicing Plan Fees rr_Component1OtherExpensesOverAssets 0.25%
Other Expenses (includes Shareholder Servicing Plan Fees) rr_OtherExpensesOverAssets 2.28%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.83% [1]
Less: Fee Waiver and Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.83%) [2]
Net Annual Fund Operating Expenses rr_NetExpensesOverAssets 1.00%
Expense Example, With Redemption, 1 Year rr_ExpenseExampleYear01 102
Expense Example, With Redemption, 3 Years rr_ExpenseExampleYear03 703
Expense Example, With Redemption, 5 Years rr_ExpenseExampleYear05 1,331
Expense Example, With Redemption, 10 Years rr_ExpenseExampleYear10 3,024
[1] Total Annual Fund Operating Expenses for the Fund do not correlate to the Ratio of Expenses to Average Net Assets Before Expense Reimbursement in the Financial Highlights section of the statutory prospectus, which reflects the operating expenses of the Fund and does not include the 0.01% attributed to acquired fund fees and expenses ("AFFE").
[2] O'Shaughnessy Asset Management, LLC (the "Adviser") has contractually agreed to waive all or a portion of its management fees and pay expenses of the Fund to ensure that Net Annual Fund Operating Expenses (excluding AFFE, interest, taxes and extraordinary expenses) do not exceed 0.99% of average daily net assets of the Fund's Class I shares (the "Expense Cap"). The Expense Cap will remain in effect through at least November 28, 2012, and may be terminated only by the Trust's Board of Trustees (the "Board"). The Adviser may request recoupment of previously waived fees and paid expenses from the Fund for three years from the date they were waived or paid, subject to the Expense Cap.