Series [Axis] Series [Axis] Series Series Institutional Advisors LargeCap Fund Institutional Advisors LargeCap Fund Share Class [Axis] Share Class [Axis] Share Classes Share Classes Institutional Advisors LargeCap Fund Institutional Advisors LargeCap Fund {75213} Performance Measure [Axis] Performance Measure [Axis] Before Taxes Before Taxes Return After Taxes on Distributions Return After Taxes on Distributions Return After Taxes on Distributions and Sale of Fund Shares Return After Taxes on Distributions and Sale of Fund Shares Comparison Index - S&P 500 Index (the performance information for this index reflects no deduction for fees, expenses or taxes) Comparison Index - S&P 500 Index (the performance information for this index reflects no deduction for fees, expenses or taxes) Risk/Return: Risk/Return: Objective [Heading] Objective [Heading] Objective, Primary [Text Block] Objective, Primary [Text Block] Expense [Heading] Expense [Heading] Expense Narrative [Text Block] Expense Narrative [Text Block] Shareholder Fees Caption [Text] Shareholder Fees Caption [Text] Shareholder Fees [Table] Shareholder Fees [Table] Operating Expenses Caption [Text] Operating Expenses Caption [Text] Annual Fund Operating Expenses [Table] Annual Fund Operating Expenses [Table] Expense Example [Heading] Expense Example [Heading] Expense Example Narrative [Text Block] Expense Example Narrative [Text Block] Expense Example, With Redemption [Table] Expense Example, With Redemption [Table] Expense Example, No Redemption [Table] Expense Example, No Redemption [Table] Portfolio Turnover [Heading] Portfolio Turnover [Heading] Portfolio Turnover [Text Block] Portfolio Turnover [Text Block] Strategy [Heading] Strategy [Heading] Strategy Narrative [Text Block] Strategy Narrative [Text Block] Risk [Heading] Risk [Heading] Risk Narrative [Text Block] Risk Narrative [Text Block] Bar Chart and Performance Table [Heading] Bar Chart and Performance Table [Heading] Performance Narrative [Text Block] Performance Narrative [Text Block] Bar Chart [Heading] Bar Chart [Heading] Bar Chart [Table] Bar Chart [Table] Bar Chart Closing [Text Block] Bar Chart Closing [Text Block] Performance Table Heading Performance Table Heading Performance Table Narrative Performance Table Narrative Performance [Table] Performance [Table] Market Index Performance [Table] Market Index Performance [Table] Shareholder Fees: Shareholder Fees: Maximum sales charge (load) imposed on purchases (as a percentage of offering price) Maximum sales charge (load) imposed on purchases (as a percentage of offering price) Maximum deferred sales charge (load) (as a percentage of the lower of purchase or sale price) Maximum deferred sales charge (load) (as a percentage of the lower of purchase or sale price) Maximum Sales charge (load) imposed on reinvested dividends (as a percentage of purchase price) Maximum Sales charge (load) imposed on reinvested dividends (as a percentage of purchase price) Redemption Fee Redemption fees Redemption fees Exchange fees Exchange fees Operating Expenses: Operating Expenses: Management Fees Management Fees Distribution and Service (12b-1) Fees Distribution and Service (12b-1) Fees Other Expenses (the Adviser pays all Fund expenses except Rule 12b-1 fees, shareholder servicing fees, interest, taxes, brokerage commissions, expenses of Independent Trustees, other expenditures that are capitalized in accordance with generally accepted accounting principles, and other extraordinary expenses not incurred in the ordinary course of such Fund's business) Other Expenses (the Adviser pays all Fund expenses except Rule 12b-1 fees, shareholder servicing fees, interest, taxes, brokerage commissions, expenses of Independent Trustees, other expenditures that are capitalized in accordance with generally accepted accounting principles, and other extraordinary expenses not incurred in the ordinary course of such Fund's business) Total Annual Fund Operating Expenses Total Annual Fund Operating Expenses Fee Waiver or Reimbursement Fee Waiver Fee Waiver Total Annual Fund Operating Expenses After Fee Waiver Total Annual Fund Operating Expenses After Fee Waiver Expense Example: Expense Example: 1 Year Expense Example, with Redemption, 1 Year 3 Years Expense Example, with Redemption, 3 Years 5 Years Expense Example, with Redemption, 5 Years 10 Years Expense Example, with Redemption, 10 Years Bar Chart Table: Bar Chart Table: Annual Return 2002 Annual Return 2002 Annual Return 2003 Annual Return 2003 Annual Return 2004 Annual Return 2004 Annual Return 2005 Annual Return 2005 Annual Return 2006 Annual Return 2006 Annual Return 2007 Annual Return 2007 Annual Return 2008 Annual Return 2008 Annual Return 2009 Annual Return 2009 Annual Return 2010 Annual Return 2010 Annual Return 2011 Annual Return 2011 Average Annual Return: Average Annual Return: 1 Year 1 Year Since Inception Since Inception Risk/Return Detail [Table] Risk/Return Detail [Table] Document Type Document Type Document Period End Date Document Period End Date Registrant Name Registrant Name Central Index Key Central Index Key Amendment Flag Amendment Flag Prospectus Date Prospectus Date Portfolio Turnover, Rate Portfolio Turnover, Rate Risk Lose Money [Text] Risk Lose Money [Text] Performance Availability Website Address [Text] Performance Availability Website Address [Text] Performance Past Does Not Indicate Future [Text] Performance Past Does Not Indicate Future [Text] Label Highest Quarterly Return, Label Highest Quarterly Return, Date Highest Quarterly Return, Date Highest Quarterly Return Highest Quarterly Return Label Lowest Quarterly Return, Label Lowest Quarterly Return, Date Lowest Quarterly Return, Date Lowest Quarterly Return Lowest Quarterly Return Performance Table Uses Highest Federal Rate Performance Table Uses Highest Federal Rate Performance Table Not Relevant to Tax Deferred Performance Table Not Relevant to Tax Deferred