Share Class [Axis] Performance Measure [Axis] Prospectus [Table] All Classes Average Annual Return, Column Name Series [Axis] All Series All Prospectus Prospectus [Axis] Creation Date Effective Date Period End Date Trading Symbol With Redemption, 1 Year No Redemption, 1 Year With Redemption, 3 Years No Redemption, 3 Years With Redemption, 5 Years No Redemption, 5 Years With Redemption, 10 Years No Redemption, 10 Years 1 Year 1 Year 3 Years 3 Years 5 Years 5 Years 10 Years 10 Years CIK Registrant Name Document Type Amendment Am.Description Prospectus Date Davis New York Venture Fund Davis New York Venture Fund - Class A Davis New York Venture Fund - Class B Davis New York Venture Fund - Class C Davis New York Venture Fund - Class Y Davis New York Venture Fund - Class R Davis Research Fund Davis Research Fund - Class A Risk/Return: Risk/Return Investment Objective: Investment Objective Secondary objectives Fees and expenses of the fund: Fees and expenses of the fund, narrative Shareholder fees, caption Shareholder fees, table Maximum sales charge (load) imposed on purchases (as a percentage of offering price.) Maximum Cumulative Sales Charge / Other Maximum Sales Charge Imposed on Purchases (as a percentage of offering price) Maximum deferred sales charge (load) (as a percentage of the offering price) Maximum deferred sales charge (load) imposed on redemptions (as a percentage of the lesser of the net asset value of the shares redeemed or the total cost of such shares. Only applies to Class A shares if you buy shares valued at $1 million or more without a sales charge and sell the shares within one year of purchase.) Maximum sales charge (load) imposed on reinvested dividends Redemption Fee (as a percentage of total redemption proceeds.) Redemption Fee (as a percentage of total redemption proceeds) Exchange Fee (as a percentage of net assets) Exchange Fee Maximum Account Fee (as a percentage of net assets) Maximum annual account fee Other Fees (as a percentage of net assets) Annual fund operating expenses, heading Annual fund operating expenses, table Management Fees Distribution and/or service (12b-1) Fees Distribution or similar (non 12b-1) Fees (as a percentage of net assets) Other Expenses, Component 1 (as a percentage of net assets) Other Expenses, Component 2 (as a percentage of net assets) Other Expenses, Component 3 (as a percentage of net assets) Other Expenses Acquired Fund Fees and Expenses (as a percentage of net assets) Total Annual Operating Expenses Less Fee Waiver or Expense Reimbursement Net Expenses Portfolio turnover, heading Portfolio turnover, narrative Portfolio Turnover Rate Expense Footnotes Deferred Charges, Narrative Range of Exchange Fees, Narrative Expense Breakpoint Discounts Expense Breakpoint, Minimum Investment Required Expense Exchange Traded Fund Commissions Expenses Represent Both Master and Feeder Expenses Explanation of Nonrecurring Account Fee Other Expenses, New Fund, Based on Estimates Acquired Fund Fees and Expenses, Based on Estimates Expenses Other Expenses Had Extraordinary Expenses Been Included Expenses Restated to Reflect Current Expenses Not Correlated to Ratio Due to Acquired Fund Fees Example, heading Expense Example, with Redemption, heading Expense Example, Narrative Expense Example, with Redemption, Caption Expense Example, with Redemption, table Expense Example, Column Name Expense Example, No Redemption, Narrative Expense Example, No Redemption, Caption Expense Example, No Redemption, table Expense Example, No Redemption, Column Name Expense Example Footnotes Expense Example Closing Strategy, Heading Strategy, Narrative Portfolio Concentration Risk, Heading Risk, Narrative Risk Footnotes Risk Closing May Lose Money Nondiversified Money Market Fund Not Insured Depository Institution Risk Caption Risk Column Name Risk Bar Chart and Performance Table, Heading Performance, Narrative Performance, Information Illustrates Variability of Returns Performance, One Year or Less Performance, Additional Market Index Performance, Availability by Phone Performance, Availability at Web Site Address Performance, Past Does Not Indicate Future Bar Chart, Heading Bar Chart, Narrative Bar Chart, Does Not Reflect Sales Loads Bar Chart Annual Return, Caption Annual Return, Inception Date 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 Bar Chart, Footnotes Bar Chart, Closing Bar Chart, Reason Selected Class Different from Immediately Preceding Period Bar Chart, Returns for Class Not Offered in Prospectus Year to Date Return, Label Year to Date Return, Date Year to Date Return Highest Quarterly Return, Label Highest Quarterly Return Date Highest Quarterly Return Lowest Quarterly Return, Label Lowest Quarterly Return Date Lowest Quarterly Return Performance Table: Performance Table Narrative Average Annual Return Caption Performance Table Past 1 Year Past 5 Years Past 10 Years Lifetime Inception Date return before taxes return after taxes on distributions return after taxes on distributions and sale of fund shares Market Index Performance S&P500® Index - reflects no deduction for fees, expenses or taxes Performance Table Footnotes, Reason Performance Information for Class Different from Immediately Preceding Period Performance Table Footnotes Performance Table Closing Performance Table Does Reflect Sales Loads Performance Table Market Index Changed Index No Deduction for Fees, Expenses, Taxes Performance Table Uses Highest Federal Rate Performance Table Not Relevant to Tax Deferred One Class of After-Tax Shown Performance Table Explains why after Tax Higher Money Market, Seven Day Yield Caption Money Market, Seven Day Yield Column Name 7-Day Yield Phone 7-Day Yield 7-Day Tax Equivalent Yield Thirty Day Yield Caption Thirty Day Yield Column Name 30-Day Yield Phone 30-Day Yield 30-DayTax Equivalent Yield Risk/Return Detail Table Text Block Class A shares Class B shares Class C shares Class Y shares Class R shares Class A shares