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Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading The Delafield Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Delafield Fund’s investment objectives are to seek long-term preservation of capital (sufficient growth to outpace inflation over an extended period of time) and growth of capital.
Expense [Heading] rr_ExpenseHeading Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Delafield Fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] 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 [Text Block] rr_PortfolioTurnoverTextBlock
The Delafield 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 Delafield Fund shares are held in a taxable account.  These costs, which are not reflected in the annual fund operating expenses or in the Example affect the Delafield Fund’s performance.  During its most recent fiscal year, the Delafield Fund’s portfolio turnover rate was 49% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 49.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in The Delafield Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Delafield 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 Delafield Fund’s operating expenses remain the same.
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Delafield Fund seeks to achieve its objectives by investing primarily in the equity securities (i.e., common stocks, securities convertible into common stocks or rights or warrants to subscribe for or purchase common stocks) of domestic companies.  Specifically, the Delafield Fund will primarily invest in equity securities of domestic companies which the portfolio managers believe to be undervalued or to represent special situations.  An example of a special situation is a company undergoing change that might cause its market value to grow at a rate faster than the market generally.

Under normal circumstances the Delafield Fund will have more than 65% of its assets invested in equity securities.  The Delafield Fund, however, may also invest not more than 35% of its total assets in debt securities and preferred stocks that the portfolio managers believe offer a significant opportunity for price appreciation.  In addition, the Delafield Fund may invest up to 25% of its net assets in non-U.S. securities, including in ADRs, in both developed and emerging markets.

The Delafield Fund may also invest in:

(i)
U.S. Government Securities: The U.S. Government securities in which the Delafield Fund may invest include obligations issued or guaranteed by the U.S. Government, its agencies or instrumentalities or by privately owned corporations that are federally chartered by the U.S. Government.

(ii)
Money Markets Funds: Money market funds are registered investment companies that invest in high-quality, short-term debt instruments of a specified nature.  The money market funds seek to maintain investment portfolios with a dollar-weighted average maturity of 60 days or less, to value their investment portfolios at amortized cost and to maintain a net asset value of $1.00 per share.
Risk [Heading] rr_RiskHeading Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
You may lose money by investing in the Delafield Fund.  The Delafield Fund is subject to the following risks:

Ÿ  
the stock markets may go down; and

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a stock or stocks selected for the Delafield Fund’s portfolio may fail to perform as expected.

The Delafield Fund also may be subject to risks particular to its investments in small cap companies and mid cap companies, including:

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Small and mid cap companies rely on limited product lines, financial resources and business activities that may make them more susceptible than larger companies to setbacks or downturns; and

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Small and mid cap companies are less liquid and more thinly traded which make them more volatile than stocks of larger companies.

In addition, there are special risks associated with investing in non-U.S. securities, including:

 
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the value of foreign currencies may decline relative to the U.S. dollar;

 
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a foreign government may expropriate the Delafield Fund’s assets;

 
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political, social or economic instability in a foreign country in which the Delafield Fund invests may cause the value of the Delafield Fund’s investments to decline; and

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the above listed risks associated with non-U.S. securities are more likely in the securities of companies located in emerging markets.

Who may want to invest in the Delafield Fund?

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investors who want a diversified portfolio

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long-term investors with a particular goal, such as saving for retirement

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investors who want potential growth over time

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investors who can tolerate short-term fluctuations in net asset value (“NAV”) per share; and

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investors seeking long-term preservation of capital (sufficient growth to outpace inflation over an extended period of time) and growth of capital.

Keep in mind that mutual fund shares:

Ÿ  
are not deposits of any bank;

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are not insured by the Federal Deposit Insurance Corporation (“FDIC”) or any other government agency; and

Ÿ  
are subject to investment risks, including the possibility that you could lose money.
Risk Lose Money [Text] rr_RiskLoseMoney You may lose money by investing in the Delafield Fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution Keep in mind that mutual fund shares are not deposits of any bank; are not insured by the Federal Deposit Insurance Corporation ("FDIC") or any other government agency
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Bar Chart and Performance Table of the Delafield Fund
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The Delafield Fund is the successor to the Delafield Fund, Inc. (the “Predecessor Delafield Fund”) pursuant to a reorganization that took place on September 28, 2009.  The performance information provided prior to September 28, 2009 is historical information for the Predecessor Delafield Fund.  The Predecessor Delafield Fund was managed by Reich & Tang Asset Management, LLC and had the same portfolio managers, investment objectives and investment strategies as the Delafield Fund.

The following chart and table below provide some indication of the risks of investing in the Delafield Fund by showing changes in the Delafield Fund’s performance from year to year (on a calendar year basis) and by showing how the Delafield Fund’s average annual returns for the 1 year, 5 years and 10 years ended December 31, 2012, compare with those of the Russell 2000® Index and the S&P 500® Index.  Please note that the Delafield Fund’s performance (before and after taxes) is not an indication of how the Delafield Fund will perform in the future.  Updated performance information in available at www.tocqueville.com/mutual-funds.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following chart and table below provide some indication of the risks of investing in the Delafield Fund by showing changes in the Delafield Fund's performance from year to year (on a calendar year basis) and by showing how the Delafield Fund's average annual returns for the 1 year, 5 years and 10 years ended December 31, 2012, compare with those of the Russell 2000 Index and the S&P 500 Index.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.tocqueville.com/mutual-funds
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please note that the Delafield Fund's performance (before and after taxes) is not an indication of how the Delafield Fund will perform in the future.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
During this period, the best performance for a quarter was 34.37% (for the quarter ended June 30, 2009).  The worst performance was -29.37% (for the quarter ended December 31, 2008).
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel best performance
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 34.37%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel worst performance
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (29.37%)
Index No Deduction for Fees, Expenses, Taxes [Text] 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 an investor's tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Performance Table Closing [Text Block] 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 shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Caption rr_AverageAnnualReturnCaption Average Annual Total Returns For the periods ended December 31, 2012
Russell 2000® Index (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 16.35%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 3.56%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 9.72%
S&P 500® Index (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 16.00%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 1.66%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 7.10%
The Delafield Fund
  
Risk/Return: rr_RiskReturnAbstract  
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Management Fees rr_ManagementFeesOverAssets 0.71%
Distribution and Service (12b-1) Fee rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.27%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.23%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 125
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 390
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 676
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,489
Annual Return 2003 rr_AnnualReturn2003 40.14%
Annual Return 2004 rr_AnnualReturn2004 20.85%
Annual Return 2005 rr_AnnualReturn2005 6.00%
Annual Return 2006 rr_AnnualReturn2006 20.38%
Annual Return 2007 rr_AnnualReturn2007 4.90%
Annual Return 2008 rr_AnnualReturn2008 (37.62%)
Annual Return 2009 rr_AnnualReturn2009 54.85%
Annual Return 2010 rr_AnnualReturn2010 26.03%
Annual Return 2011 rr_AnnualReturn2011 (7.17%)
Annual Return 2012 rr_AnnualReturn2012 20.21%
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 20.21%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 6.32%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 11.90%
The Delafield Fund | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 19.20%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 6.05%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 10.78%
The Delafield Fund | After Taxes on Distributions and Sale of Fund Shares
  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 14.47%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 5.42%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 10.25%