0000930413-11-003911.txt : 20110512 0000930413-11-003911.hdr.sgml : 20110512 20110512171145 ACCESSION NUMBER: 0000930413-11-003911 CONFORMED SUBMISSION TYPE: 485BPOS PUBLIC DOCUMENT COUNT: 7 FILED AS OF DATE: 20110512 DATE AS OF CHANGE: 20110512 EFFECTIVENESS DATE: 20110512 FILER: COMPANY DATA: COMPANY CONFORMED NAME: VAN ECK FUNDS CENTRAL INDEX KEY: 0000768847 IRS NUMBER: 000000000 STATE OF INCORPORATION: NY FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 485BPOS SEC ACT: 1933 Act SEC FILE NUMBER: 002-97596 FILM NUMBER: 11836663 BUSINESS ADDRESS: STREET 1: 335 MADISON AVENUE - 19TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10017 BUSINESS PHONE: 212-293-2000 MAIL ADDRESS: STREET 1: 335 MADISON AVENUE - 19TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10017 FILER: COMPANY DATA: COMPANY CONFORMED NAME: VAN ECK FUNDS CENTRAL INDEX KEY: 0000768847 IRS NUMBER: 000000000 STATE OF INCORPORATION: NY FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 485BPOS SEC ACT: 1940 Act SEC FILE NUMBER: 811-04297 FILM NUMBER: 11836664 BUSINESS ADDRESS: STREET 1: 335 MADISON AVENUE - 19TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10017 BUSINESS PHONE: 212-293-2000 MAIL ADDRESS: STREET 1: 335 MADISON AVENUE - 19TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10017 0000768847 S000009198 Emerging Markets Fund C000024992 Class A GBFAX C000024993 Class C EMRCX C000033045 Class I EMRIX C000088110 Class Y EMRYX 0000768847 S000009199 International Investors Gold Fund C000024994 Class A INIVX C000024995 Class C IIGCX C000033046 Class I INIIX C000088111 Class Y INIYX 0000768847 S000009200 Global Hard Assets Fund C000024996 Class A GHAAX C000024997 Class C GHACX C000033047 Class I GHAIX C000088112 Class Y GHAYX 0000768847 S000024722 Multi-Manager Alternatives Fund C000073442 Class A VMAAX C000073444 Class I VMAIX C000088113 Class Y VMAYX 0000768847 S000029608 Van Eck CM Commodity Index Fund C000090895 Class A CMCAX C000090897 Class I COMIX C000090898 Class Y CMCYX 485BPOS 1 c65114_485bpos.htm Untitled Document

As filed with the Securities and Exchange Commission on May 12, 2011

 

1933 Act File No. 002-97596
1940 Act File No. 811-04297

 

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

 

FORM N-1A

 

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 [X]
Pre-Effective Amendment No. ___ [  ]
Post-Effective Amendment No. 102 [X]

 

and/or

 

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940 [X]
Amendment No. 103 [X]

 

VAN ECK FUNDS
(Exact Name of Registrant as Specified in Charter)

 

335 Madison Avenue
New York, New York 10017
(Address of Principal Executive Offices)(Zip Code)
Registrant’s Telephone Number, Including Area Code: (212) 293-2000

 

Joseph J. McBrien, Esq.
Van Eck Associates Corporation
335 Madison Avenue
New York, New York 10017
(Name and Address of Agent for Service)

Copy to:
Philip H. Newman, Esq.
Goodwin Procter LLP
Exchange Place
53 State Street
Boston, Massachusetts 02109

 

Approximate Date of Proposed Public Offering:

As soon as practicable after the effective date of this registration statement.

 

It is proposed that this filing will become effective (check appropriate box)

 

[X] immediately upon filing pursuant to paragraph (b)
[  ] on (date) pursuant to paragraph (b)
[  ] 60 days after filing pursuant to paragraph (a)(1)
[  ] on (date) pursuant to paragraph (a)(1)
[  ] 75 days after filing pursuant to paragraph (a)(2)
[  ] on (date) pursuant to paragraph (a)(2) of Rule 485.

 

If appropriate, check the following box:

 

[  ] This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all of the requirements for effectiveness of this registration statement under Rule 485(b) under the Securities Act of 1933 and has duly caused this post-effective amendment to the registration statement to be signed on its behalf by the undersigned, duly authorized, in the City of New York and State of New York on the 12th day of May, 2011.

VAN ECK FUNDS

By: /s/ Jan F. van Eck*
Name: Jan F. van Eck*
Title: Chief Executive Officer & President

Pursuant to the requirements of the Securities Act of 1933, this post-effective amendment no. 102 to the registration statement has been signed below by the following persons in the capacities and on the date(s) indicated.

/s/ Jan F. van Eck*

Jan F. van Eck*

 Chief Executive Officer & President May 12, 2011

/s/ Bruce J. Smith*

Bruce J. Smith*

 Senior Vice President & Chief Financial Officer May 12, 2011

/s/ Jane DiRenzo Pigott*

Jane DiRenzo Pigott*

 Trustee May 12, 2011

/s/ Jon Lukomnik*

Jon Lukomnik*

 Trustee May 12, 2011

/s/ Wayne H. Shaner*

Wayne H. Shaner*

 Trustee May 12, 2011

/s/ R. Alastair Short*

R. Alastair Short*

 Trustee May 12, 2011

/s/ Richard D. Stamberger*

Richard D. Stamberger*

 Trustee May 12, 2011

/s/ Robert L. Stelzl*

Robert L. Stelzl*

 Trustee May 12, 2011

 

 

*BY: /s/ JONATHAN R. SIMON
  Jonathan R. Simon
  Attorney-in-Fact

EXHIBITS INDEX

 

EX-101.INS XBRL Instance Document
EX-101.SCH XBRL Taxonomy Extension Schema Document
EX-101.DEF XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB XBRL Taxonomy Extension Labels Linkbase
EX-101.PRE XBRL Taxonomy Extension Presentation Linkbase

 

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During such time, the expense limitation is expected to continue until the Board of Trustees acts to discontinue all or a portion of such expense limitation. 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. These returns are shown for one class of shares only; after tax-returns for the other classes may vary. Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-deferred account, such as a 401(k) plan or Investment Retirement Account. Van Eck Associates Corporation (the "Adviser") has agreed to waive fees and/or pay Fund expenses to the extent necessary to prevent the operating expenses of the Fund (excluding acquired fund fees and expenses, interest expense, trading expenses, dividends on securities sold short, taxes and extraordinary expenses) from exceeding 1.38% for Class A, 2.20% for Class C, 1.00% for Class I, and 1.13% for Class Y of the Fund's average daily net assets per year until May 1, 2012. During such time, the expense limitation is expected to continue until the Board of Trustees acts to discontinue all or a portion of such expense limitation. 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. These returns are shown for one class of shares only; after tax-returns for the other classes may vary. Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-deferred account, such as a 401(k) plan or Investment Retirement Account. 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. These returns are shown for one class of shares only; after tax-returns for the other classes may vary. Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-deferred account, such as a 401(k) plan or Investment Retirement Account. Van Eck Associates Corporation (the "Adviser") has agreed to waive fees and/or pay Fund expenses to the extent necessary to prevent the operating expenses of the Fund (excluding acquired fund fees and expenses, interest expense, trading expenses, dividends on securities sold short, taxes and extraordinary expenses) from exceeding 2.40% for Class A, 1.95% for Class I, and 2.00% for Class Y of the Fund's average daily net assets per year until May 1, 2012. During such time, the expense limitation is expected to continue until the Board of Trustees acts to discontinue all or a portion of such expense limitation. 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. These returns are shown for one class of shares only; after tax-returns for the other classes may vary. Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-deferred account, such as a 401(k) plan or Investment Retirement Account. Other expenses are based on estimated amounts for the current fiscal year. Van Eck Associates Corporation (the "Adviser") has agreed to waive fees and/or pay Fund expenses to the extent necessary to prevent the operating expenses of the Fund (excluding acquired fund fees and expenses, interest expense, trading expenses, dividends on securities sold short, taxes and extraordinary expenses) from exceeding 0.95% for Class A, 0.65% for Class I, and 0.70% for Class Y of the Fund's average daily net assets per year until May 1, 2012. During such time, the expense limitation is expected to continue until the Board of Trustees acts to discontinue all or a portion of such expense limitation. VAN ECK FUNDS 485BPOS false 0000768847 2011-04-14 2011-04-14 2011-05-01 2011-05-01 RISK/RETURN INVESTMENT OBJECTIVE <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Emerging Markets Fund seeks long-term capital appreciation by investing primarily in equity securities in emerging markets around the world.</font></p> FUND FEES AND EXPENSES <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds. More information about these and other discounts is available from your financial professional and in the &#8220;Shareholder Information&#8221; section of the Fund&#8217;s prospectus and in the &#8220;Availability of Discounts&#8221; and &#8220;Breakpoint Linkage Rules for Discounts&#8221; sections of the Fund&#8217;s Statement of Additional Information (&#8220;SAI&#8221;).</font></p> 0.0575 0.0000 0.0000 0.0000 0.0000 0.0100 0.0000 0.0000 0.0075 0.0075 0.0075 0.0075 0.0025 0.0100 0.0000 0.0000 0.0074 0.0086 0.0148 0.0098 0.0174 0.0261 0.0223 0.0173 0.0000 -0.0011 -0.0098 -0.0003 0.0174 0.0250 0.0125 0.0170 ~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact cik0000768847_S000009198Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact cik0000768847_S000009198Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ 2012-05-01 You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds.More information about these and other discounts is available from your financial professional and in the "Shareholder Information" section of the Fund's prospectus and in the "Availability of Discounts" and "Breakpoint Linkage Rules for Discounts" sections of the Fund's Statement of Additional Information ("SAI"). Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 25000 Shareholder Fees (fees paid directly from your investment) Expense Example <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following 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 either redeem all of your shares at the end of these periods or continue to hold them. The example also assumes that your investment has a 5% return each year and that the Fund&#8217;s operating expenses remain the same. Although your actual expenses may be higher or lower, based on these assumptions, your costs would be:</font></p> 742 742 1091 1091 1464 1464 2509 2509 353 801 1375 2936 253 801 1375 2936 127 127 603 603 1105 1105 2488 2488 173 173 542 542 936 936 2038 2038 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact cik0000768847_S000009198Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption column dei_LegalEntityAxis compact cik0000768847_S000009198Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ Sold Held PORTFOLIO TURNOVER <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 110% of the average value of its portfolio.</font></p> 1.10 PRINCIPAL INVESTMENT STRATEGIES <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Under normal conditions, the Fund invests at least 80% of its net assets in securities of companies that are organized in, maintain at least 50% of their assets in, or derive at least 50% of their revenues from, emerging market countries. An emerging market country is any country that has been determined by an international organization, such as the World Bank, to have a low to middle income economy. The Fund is considered to be &#8220;non-diversified&#8221; which means that it may invest in fewer securities than a &#8220;diversified&#8221; fund.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Utilizing qualitative and quantitative measures, the Fund&#8217;s portfolio manager selects companies that have growth potential, specifically focusing on small- to mid- capitalization companies. Candidates for the Fund&#8217;s portfolio are ranked based on their relative desirability based on a wide range of financial criteria and are regularly reviewed to ensure that they continue to meet the ranking and desirability criteria.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund&#8217;s holdings may include issues denominated in currencies of emerging countries, investment companies (like country funds) that invest in emerging countries, and American Depositary Receipts, and similar types of investments, representing emerging markets securities.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may use derivative instruments, such as structured notes, futures, options and swap agreements, to gain or hedge exposure.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may invest up to 20% of its net assets in securities issued by other investment companies, including exchange-traded funds (&#8220;ETFs&#8221;). The Fund may also invest in money market funds, but these investments are not subject to this limitation. The Fund may invest in ETFs to participate in, or gain rapid exposure to, certain market sectors, or when direct investments in certain countries are not permitted.</font></p> PRINCIPAL RISKS <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">There is no assurance that the Fund will achieve its investment objective. The Fund&#8217;s share price and return will fluctuate with changes in the market value of the Fund&#8217;s portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Derivatives.</b> The use of derivatives, such as swap agreements, options, warrants, futures contracts, currency forwards and structured notes, presents risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. The use of derivatives can lead to losses because of adverse movements in the price or value of the underlying security, asset, index or reference rate. Derivative strategies often involve leverage, which may exaggerate a loss, potentially causing a Fund to lose more money than it would have lost had it invested in the underlying security. Also, a liquid secondary market may not always exist for the Fund&#8217;s derivative positions at times when the Fund might wish to terminate or sell such positions and over the counter instruments may be illiquid.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Direct Investments.</b> Direct investments may involve a high degree of business and financial risk that can result in substantial losses. Because of the absence of any public trading market for these investments, a Fund may take longer to liquidate these positions than would be the case for publicly traded securities. Direct investments are generally considered illiquid and will be aggregated with other illiquid investments for purposes of the limitation on illiquid investments.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Emerging Markets Securities.</b> Emerging markets securities typically present even greater exposure to the risks described under &#8220;Foreign Securities&#8221; and may be particularly sensitive to certain economic changes. Emerging markets securities are exposed to a number of risks that may make these investments volatile in price or difficult to trade.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Foreign Currency Transactions.</b> An investment transacted in a foreign currency may lose value due to fluctuations in the rate of exchange. These fluctuations can make the return on an investment go up or down, entirely apart from the quality or performance of the investment itself.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Foreign Securities.</b> Foreign investments are subject to greater risks than U.S. domestic investments. These additional risks may include exchange rate fluctuations and exchange controls; less publicly available information; more volatile or less liquid securities markets; and the possibility of arbitrary action by foreign governments, or political, economic or social instability. Foreign companies also may be subject to significantly higher levels of taxation than U.S. companies, including potentially confiscatory levels of taxation, thereby reducing the earnings potential of such foreign companies.</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Investments in Other Investment Companies.</b> A Fund&#8217;s investment in another investment company may subject the Fund indirectly to the underlying risks of the investment company. The Fund also will bear its share of the underlying investment company&#8217;s fees and expenses, which are in addition to the Fund&#8217;s own fees and expenses.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Market.</b> Market risk refers to the risk that the market prices of securities that a Fund holds will rise or fall, sometimes rapidly or unpredictably. In general, equity securities tend to have greater price volatility than debt securities.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Non-Diversification.</b> A non-diversified fund&#8217;s greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund&#8217;s portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Small- and Medium-Capitalization Companies.</b> Securities of small- and medium-sized companies often have greater price volatility, lower trading volume and less liquidity than larger more established companies. The stocks of small- and medium-sized companies may have returns that vary, sometimes significantly, from the overall stock market.</font></p> The Fund's share price and return will fluctuate with changes in the market value of the Fund's portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money. Non-Diversification. A non-diversified fund's greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund's portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio. PERFORMANCE <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund&#8217;s performance from year to year and by showing how the Fund&#8217;s average annual total returns compare with those of a broad measure of market performance and one or more other performance measures. For instance, the Morgan Stanley Capital International (MSCI) Emerging Markets Index, calculated with dividends reinvested, captures 60% of the publicly traded equities in each industry for approximately 25 emerging markets. The Fund&#8217;s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. The annual returns in the bar chart are for the Fund&#8217;s Class&#160;A shares and do not reflect sales loads. If sales loads were reflected, returns would be less than those shown.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Additionally, large purchases and/or redemptions of shares of a class, relative to the amount of assets represented by the class, may cause the annual returns for each class to differ. Updated performance information for the Fund is available on the Van Eck website at vaneck.com.</font></p> CLASS A: Annual Total Returns (%) as of 12/31 -0.2732 -0.2504 0.7505 0.1979 0.2977 0.3898 0.3566 -0.6812 1.2037 0.2817 ~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact cik0000768847_S000009198Member column rr_ProspectusShareClassAxis compact cik0000768847_C000024992Member row primary compact * ~ <p align="center"><font style="font-family:sans-serif; font-size:3.5mm;"></font></p> Best Quarter 0.5906 2009-06-30 Worst Quarter -0.3859 2008-12-31 <table cellspacing="0" style="margin-left:0.00%;margin-right:0.00%;width:100.00%;"> <tr valign="top"> <td style="width:13.69%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:8.73%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:77.58%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> </tr> <tr valign="top"> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Best Quarter:</b></font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">+59.06%</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">2Q &#8217;09</font></p> </td> </tr> <tr valign="top"> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Worst Quarter:</b></font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">-38.59%</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">4Q &#8217;08</font></p> </td> </tr> </table> 0.2083 0.0985 0.0902 0.2072 0.0846 0.0791 0.1354 0.0798 0.0748 0.2616 0.1036 0.1571 0.2875 -0.0272 0.2148 0.1920 0.1310 0.1621 2007-12-31 2010-05-01 2003-10-03 1993-12-20 ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact cik0000768847_S000009198Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~ 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. The following chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance and one or more other performance measures. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. These returns are shown for one class of shares only; after tax-returns for the other classes may vary. vaneck.com Average Annual Total Returns as of 12/31/10 Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-deferred account, such as a 401(k) plan or Investment Retirement Account. RISK/RETURN INVESTMENT OBJECTIVE <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Global Hard Assets Fund seeks long-term capital appreciation by investing primarily in hard asset securities. Income is a secondary consideration.</font></p> FUND FEES AND EXPENSES <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds. 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The example also assumes that your investment has a 5% return each year and that the Fund&#8217;s operating expenses remain the same. Although your actual expenses may be higher or lower, based on these assumptions, your costs would be:</font></p> 708 708 998 998 1308 1308 2186 2186 319 676 1159 2493 219 676 1159 2493 103 103 330 330 575 575 1279 1279 112 112 350 350 606 606 1340 1340 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact cik0000768847_S000009200Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption column dei_LegalEntityAxis compact cik0000768847_S000009200Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ Sold Held PORTFOLIO TURNOVER <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 66% of the average value of its portfolio.</font></p> 0.66 PRINCIPAL INVESTMENT STRATEGIES <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Under normal conditions, the Fund invests at least 80% of its net assets in securities of &#8220;hard asset&#8221; companies and instruments that derive their value from &#8220;hard assets&#8221;. Hard assets include precious metals (including gold), base and industrial metals, energy, natural resources and other commodities. A hard assets company is a company that derives, directly or indirectly, at least 50% of its revenues from exploration, development, production, distribution or facilitation of processes relating to hard assets. The Fund concentrates its investments in the securities of hard assets companies and instruments that derive their value from hard assets. The Fund is considered to be &#8220;non-diversified&#8221; which means that it may invest in fewer securities than a &#8220;diversified&#8221; fund.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may invest without limitation in any one hard asset sector and is not required to invest any portion of its assets in any one hard asset sector. The Fund may invest in securities of companies located anywhere in the world, including the U.S. Under ordinary circumstances, the Fund will invest in securities of issuers from a number of different countries, and may invest any amount of its assets in emerging markets. The Fund may invest in securities of companies of any capitalization range. Utilizing qualitative and quantitative measures, the Fund&#8217;s investment management team selects equity securities of companies that it believes represent value opportunities and/or that have growth potential. Candidates for the Fund&#8217;s portfolio are evaluated based on their relative desirability using a wide range of criteria and are regularly reviewed to ensure that they continue to offer absolute and relative desirability.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may use derivative instruments, such as structured notes, futures, options and swap agreements, to gain or hedge exposure to hard assets, hard asset companies and other assets. The Fund may enter into foreign currency transactions to attempt to moderate the effect of currency fluctuations. The Fund may write covered call options on portfolio securities to the extent that the value of all securities with respect to which covered calls are written does not exceed 10% of the Fund&#8217;s net asset value. The Fund may also invest up to 20% of its net assets in securities issued by other investment companies, including exchange-traded funds (&#8220;ETFs&#8221;). The Fund may also invest in money market funds, but these investments are not subject to this limitation. The Fund may invest in ETFs to participate in, or gain rapid exposure to, certain market sectors, or when direct investments in certain countries are not permitted.</font></p> PRINCIPAL RISKS <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">There is no assurance that the Fund will achieve its investment objective. The Fund&#8217;s share price and return will fluctuate with changes in the market value of the Fund&#8217;s portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Commodities and Commodity-Linked Derivatives.</b> Exposure to the commodities markets, such as precious metals, industrial metals, gas and other energy products and natural resources, may subject a Fund to greater volatility than investments in traditional securities. The commodities markets may fluctuate widely based on a variety of factors including changes in overall market movements, political and economic events and policies, war, acts of terrorism and changes in interest rates or inflation rates. Because the value of a commodity-linked derivative instrument and structured note typically are based upon the price movements of physical commodities, the value of these securities will rise or fall in response to changes in the underlying commodities or related index of investment.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Derivatives.</b> The use of derivatives, such as swap agreements, options, warrants, futures contracts, currency forwards and structured notes, presents risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. The use of derivatives can lead to losses because of adverse movements in the price or value of the underlying security, asset, index or reference rate. Derivative strategies often involve leverage, which may exaggerate a loss, potentially causing a Fund to lose more money than it would have lost had it invested in the underlying security. Also, a liquid secondary market may not always exist for the Fund&#8217;s derivative positions at times when the Fund might wish to terminate or sell such positions and over the counter instruments may be illiquid.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Direct Investments.</b> Direct investments may involve a high degree of business and financial risk that can result in substantial losses. Because of the absence of any public trading market for these investments, a Fund may take longer to liquidate these positions than would be the case for publicly traded securities. 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The stocks of small<i>-</i> and medium-sized companies may have returns that vary, sometimes significantly, from the overall stock market.</font></p> The Fund's share price and return will fluctuate with changes in the market value of the Fund's portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money. Non-Diversification. A non-diversified fund's greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund's portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio. PERFORMANCE <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund&#8217;s performance from year to year and by showing how the Fund&#8217;s average annual total returns compare with those of a broad measure of market performance and one or more other performance measures. For instance, the S&amp;P North American Natural Resources Sector Index includes mining, energy, paper and forest products, and plantation-owning companies. The Fund&#8217;s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. The annual returns in the bar chart are for the Fund&#8217;s Class&#160;A shares and do not reflect sales loads. If sales loads were reflected, returns would be less than those shown.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Additionally, large purchases and/or redemptions of shares of a class, relative to the amount of assets represented by the class, may cause the annual returns for each class to differ. Updated performance information for the Fund is available on the Van Eck website at vaneck.com.</font></p> CLASS A: Annual Total Returns (%) as of 12/31 -0.0856 0.0677 0.4244 0.2287 0.4872 0.2286 0.4262 -0.4468 0.5246 0.2843 ~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact cik0000768847_S000009200Member column rr_ProspectusShareClassAxis compact cik0000768847_C000024996Member row primary compact * ~ <p align="center"><font style="font-family:sans-serif; font-size:3.5mm;"></font></p> Best Quarter 0.2425 2005-09-30 Worst Quarter -0.3578 2008-09-30 <table cellspacing="0" style="margin-left:0.00%;margin-right:0.00%;width:100.00%;"> <tr valign="top"> <td style="width:13.69%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:8.73%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:77.58%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> </tr> <tr valign="top"> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Best Quarter:</b></font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">+24.25%</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">3Q &#8217;05</font></p> </td> </tr> <tr valign="top"> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Worst Quarter:</b></font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">-35.78%</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">3Q &#8217;08</font></p> </td> </tr> </table> 0.2104 0.1233 0.1635 0.2086 0.1144 0.1589 0.1367 0.1042 0.1469 0.2644 0.1281 0.1617 0.2893 0.1027 0.2047 0.2388 0.0898 0.0994 0.1506 0.0229 0.0141 1994-11-02 1994-11-02 2010-05-01 2006-05-01 ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact cik0000768847_S000009200Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~ 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. The following chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance and one or more other performance measures. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. These returns are shown for one class of shares only; after tax-returns for the other classes may vary. vaneck.com Average Annual Total Returns as of 12/31/10 Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-deferred account, such as a 401(k) plan or Investment Retirement Account. RISK/RETURN INVESTMENT OBJECTIVE <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The International Investors Gold Fund seeks long-term capital appreciation by investing in common stocks of gold-mining companies. The Fund may take current income into consideration when choosing investments.</font></p> FUND FEES AND EXPENSES <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds. 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More information about these and other discounts is available from your financial professional and in the "Shareholder Information" section of the Fund's prospectus and in the "Availability of Discounts" and "Breakpoint Linkage Rules for Discounts" sections of the Fund's SAI. Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 25000 Shareholder Fees (fees paid directly from your investment) Expense Example <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following 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 either redeem all of your shares at the end of these periods or continue to hold them. The example also assumes that your investment has a 5% return each year and that the Fund&#8217;s operating expenses remain the same. Although your actual expenses may be higher or lower, based on these assumptions, your costs would be:</font></p> 695 695 949 949 1222 1222 1999 1999 298 612 1052 2275 198 612 1052 2275 103 103 322 322 558 558 1236 1236 113 113 353 353 612 612 1352 1352 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact cik0000768847_S000009199Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption column dei_LegalEntityAxis compact cik0000768847_S000009199Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ Sold Held PORTFOLIO TURNOVER <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 33% of the average value of its portfolio.</font></p> 0.33 PRINCIPAL INVESTMENT STRATEGIES <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Under normal conditions, the Fund invests at least 80% of its net assets in securities of companies principally engaged in gold-related activities, instruments that derive their value from gold, gold coins and bullion. A company principally engaged in gold-related activities is one that derives at least 50% of its revenues from gold-related activities, including the exploration, mining or processing of or dealing in gold. The Fund concentrates its investments in the gold-mining industry and therefore invests 25% or more of its total assets in such industry. The Fund is considered to be &#8220;non-diversified&#8221; which means that it may invest in fewer securities than a &#8220;diversified&#8221; fund.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund invests in securities of companies with economic ties to countries throughout the world, including the U.S. Under ordinary circumstances, the Fund will invest in securities of issuers from a number of different countries. The Fund may invest in securities of companies of any capitalization range. The Fund primarily invests in companies that the portfolio manager believes represent value opportunities and/or that have growth potential within their market niche, through their ability to increase production capacity at reasonable cost or make gold discoveries around the world. The portfolio manager utilizes both a macro-economic examination of gold market themes and a fundamental analysis of prospective companies in the search for value and growth opportunities.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may invest up to 12.5% of its net assets, as of the date of the investment, in gold and silver coins, as well as gold, silver, platinum and palladium bullion. The Fund&#8217;s investments in coins and bullion will not earn income, and the sole source of return to the Fund from these investments will be from gains or losses realized on the sale of such investments.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may use derivative instruments, such as structured notes, futures, options and swap agreements, to gain or hedge exposure. The Fund may invest up to 20% of its net assets in securities issued by other investment companies, including exchange-traded funds (&#8220;ETFs&#8221;). The Fund may also invest in money market funds, but these investments are not subject to this limitation. The Fund may invest in ETFs to participate in, or gain rapid exposure to, certain market sectors, or when direct investments in certain countries are not permitted.</font></p> PRINCIPAL RISKS <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">There is no assurance that the Fund will achieve its investment objective. The Fund&#8217;s share price and return will fluctuate with changes in the market value of the Fund&#8217;s portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Commodities and Commodity-Linked Derivatives.</b> Exposure to the commodities markets, such as precious metals, industrial metals, gas and other energy products and natural resources, may subject a Fund to greater volatility than investments in traditional securities. The commodities markets may fluctuate widely based on a variety of factors including changes in overall market movements, political and economic events and policies, war, acts of terrorism and changes in interest rates or inflation rates. Because the value of a commodity-linked derivative instrument and structured note typically are based upon the price movements of physical commodities, the value of these securities will rise or fall in response to changes in the underlying commodities or related index of investment.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Concentration in Gold-Mining Industry.</b> The Fund may be subject to greater risks and market fluctuations than a fund whose portfolio has exposure to a broader range of industries. The Fund may be susceptible to financial, economic, political or market events, as well as government regulation, impacting the gold industry. Fluctuations in the price of gold often dramatically affect the profitability of companies in the gold industry.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Derivatives.</b> The use of derivatives, such as swap agreements, options, warrants, futures contracts, currency forwards and structured notes, presents risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. The use of derivatives can lead to losses because of adverse movements in the price or value of the underlying security, asset, index or reference rate. Derivative strategies often involve leverage, which may exaggerate a loss, potentially causing a Fund to lose more money than it would have lost had it invested in the underlying security. Also, a liquid secondary market may not always exist for the Fund&#8217;s derivative positions at times when the Fund might wish to terminate or sell such positions and over the counter instruments may be illiquid.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Direct Investments.</b> Direct investments may involve a high degree of business and financial risk that can result in substantial losses. Because of the absence of any public trading market for these investments, a Fund may take longer to liquidate these positions than would be the case for publicly traded securities. Direct investments are generally considered illiquid and will be aggregated with other illiquid investments for purposes of the limitation on illiquid investments.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Emerging Markets Securities.</b> Emerging markets securities typically present even greater exposure to the risks described under &#8220;Foreign Securities&#8221; and may be particularly sensitive to certain economic changes. Emerging markets securities are exposed to a number of risks that may make these investments volatile in price or difficult to trade.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Foreign Currency Transactions.</b> An investment transacted in a foreign currency may lose value due to fluctuations in the rate of exchange. These fluctuations can make the return on an investment go up or down, entirely apart from the quality or performance of the investment itself.</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Foreign Securities.</b> Foreign investments are subject to greater risks than U.S. domestic investments. These additional risks may include exchange rate fluctuations and exchange controls; less publicly available information; more volatile or less liquid securities markets; and the possibility of arbitrary action by foreign governments, or political, economic or social instability. Foreign companies also may be subject to significantly higher levels of taxation than U.S. companies, including potentially confiscatory levels of taxation, thereby reducing the earnings potential of such foreign companies.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Investments in Other Investment Companies.</b> A Fund&#8217;s investment in another investment company may subject the Fund indirectly to the underlying risks of the investment company. The Fund also will bear its share of the underlying investment company&#8217;s fees and expenses, which are in addition to the Fund&#8217;s own fees and expenses.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Market.</b> Market risk refers to the risk that the market prices of securities that a Fund holds will rise or fall, sometimes rapidly or unpredictably. In general, equity securities tend to have greater price volatility than debt securities.</font></p> <p style="margin:3.5mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Non-Diversification.</b> A non-diversified fund&#8217;s greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund&#8217;s portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio.</font></p> <p style="margin:3.5mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Small- and Medium-Capitalization Companies.</b> Securities of small- and medium-sized companies often have greater price volatility, lower trading volume and less liquidity than larger more established companies. The stocks of small- and medium-sized companies may have returns that vary, sometimes significantly, from the overall stock market.</font></p> The Fund's share price and return will fluctuate with changes in the market value of the Fund's portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money. Non-Diversification. A non-diversified fund's greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund's portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio. PERFORMANCE <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund&#8217;s performance from year to year and by showing how the Fund&#8217;s average annual total returns compare with those of a broad measure of market performance and one or more other performance measures. For instance, the NYSE Arca Gold Miners (GDM) Index is a modified market capitalization-weighted index comprised of publicly traded companies involved primarily in the mining for gold. The GDM Index has only been calculated in real time by an independent calculation agent since October 7, 2004. The Fund&#8217;s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. The annual returns in the bar chart are for the Fund&#8217;s Class&#160;A shares and do not reflect sales loads. If sales loads were reflected, returns would be less than those shown.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Additionally, large purchases and/or redemptions of shares of a class, relative to the amount of assets represented by the class, may cause the annual returns for each class to differ. During the 12-month period ended December 31, 2008, the performance of the Class I shares of the Fund was materially affected by significant redemptions of Class I shares during that period. Updated performance information for the Fund is available on the Van Eck website at vaneck.com.</font></p> CLASS A: Annual Total Returns (%) as of 12/31 0.2074 0.9048 0.4425 -0.0773 0.3562 0.4523 0.2741 -0.2903 0.6375 0.5099 ~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact cik0000768847_S000009199Member column rr_ProspectusShareClassAxis compact cik0000768847_C000024994Member row primary compact * ~ <p align="center"><font style="font-family:sans-serif; font-size:3.5mm;"></font></p> Best Quarter 0.4496 2002-03-31 Worst Quarter -0.3182 2008-09-30 <table cellspacing="0" style="margin-left:0.00%;margin-right:0.00%;width:100.00%;"> <tr valign="top"> <td style="width:13.69%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:8.73%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:77.58%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> </tr> <tr valign="top"> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Best Quarter:</b></font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">+44.96%</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">1Q &#8217;02</font></p> </td> </tr> <tr valign="top"> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Worst Quarter:</b></font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">-31.82%</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">3Q &#8217;08</font></p> </td> </tr> </table> 0.4234 0.2508 0.2895 0.3713 0.2207 0.2626 0.2894 0.2056 0.2507 0.4889 0.2565 0.2435 0.5147 0.2998 0.3259 0.3475 0.1465 0.1506 0.0229 0.0141 2006-10-02 2003-10-03 2010-05-01 1956-02-10 ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact cik0000768847_S000009199Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~ 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. The following chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance and one or more other performance measures. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. These returns are shown for one class of shares only; after tax-returns for the other classes may vary. vaneck.com Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-deferred account, such as a 401(k) plan or Investment Retirement Account. Average Annual Total Returns as of 12/31/10 RISK/RETURN INVESTMENT OBJECTIVE <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Multi-Manager Alternatives Fund seeks to achieve consistent absolute (positive) returns in various market cycles.</font></p> FUND FEES AND EXPENSES <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the <b></b>Van Eck Funds. More information about these and other discounts is available from your financial professional and in the &#8220;Shareholder Information&#8221; section of the Fund&#8217;s prospectus and in the &#8220;Availability of Discounts&#8221; and &#8220;Breakpoint Linkage Rules for Discounts&#8221; sections of the Fund&#8217;s Statement of Additional Information (&#8220;SAI&#8221;).</font></p> 0.0575 0.0000 0.0000 0.0000 0.0000 0.0000 0.0132 0.0132 0.0132 0.0025 0.0000 0.0000 0.0027 0.0027 0.0030 0.0075 0.0076 0.0066 0.0078 0.0078 0.0078 0.0337 0.0313 0.0306 0.0000 -0.0013 0.0000 0.0337 0.0300 0.0306 ~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact cik0000768847_S000024722Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact cik0000768847_S000024722Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ 2012-05-01 You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds. More information about these and other discounts is available from your financial professional and in the "Shareholder Information" section of the Fund's prospectus and in the "Availability of Discounts" and "Breakpoint Linkage Rules for Discounts" sections of the Fund's Statement of Additional Information ("SAI"). Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 25000 Shareholder Fees (fees paid directly from your investment) Expense Example <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following 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 either redeem all of your shares at the end of these periods or continue to hold them. The example also assumes that your investment has a 5% return each year and that the Fund&#8217;s operating expenses remain the same. Although your actual expenses may be higher or lower, based on these assumptions, your costs would be:</font></p> 340 340 1036 1036 1755 1755 3658 3658 303 303 954 954 1629 1629 3430 3430 309 309 945 945 1606 1606 3374 3374 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact cik0000768847_S000024722Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption column dei_LegalEntityAxis compact cik0000768847_S000024722Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ Sold Held PORTFOLIO TURNOVER <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 275% of the average value of its portfolio.</font></p> 2.75 PRINCIPAL INVESTMENT STRATEGIES <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund pursues its objective by allocating its assets among (i) investment sub-advisers (the &#8220;Sub-Advisers&#8221;, also referred to as &#8220;managers&#8221;) with experience in managing alternative or non-traditional investment strategies, and (ii) affiliated and unaffiliated funds, including open end and closed end funds and exchange-traded funds (&#8220;ETFs&#8221;), which employ a variety of investment strategies (collectively, the &#8220;Underlying Funds&#8221;). The Fund is considered to be &#8220;non-diversified&#8221; which means that it may invest in fewer securities than a &#8220;diversified&#8221; fund.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The main strategies that may be employed by the Sub-Advisers and the Underlying Funds include:</font></p> <p style="margin:3.5mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm; color:#003aa8;"><i>DIRECTIONAL AND TACTICAL STRATEGIES</i></font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Directional and tactical strategies seek to exploit broad market trends in equities, interest rates or commodity prices. These strategies may include:</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Long/Short Equity:</b> A long/short strategy seeks to invest in securities believed to be undervalued or offer high growth opportunities while also attempting to reduce overall market risk or take advantage of an anticipated decline in the price of an overvalued company or index by using short sales or options on common stocks or indexes to hedge risk. This strategy may also use derivatives, including options, financial futures and options on futures. Long and short positions may not be invested in equal dollars and, as such, may not seek to neutralize general market risks.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Long-Only:</b> A long-only strategy seeks to invest in stocks that are believed to have appreciation potential. This strategy may concentrate in certain markets, industries or geographical areas. This strategy is primarily managed for absolute return and to assess risk and opportunity on an absolute, not an index-relative basis.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Short-Only:</b> A short-only strategy seeks to identify securities that are expected to depreciate in value. In a short sale, the Fund borrows an equity security from a broker, and then sells it. If the value of the security goes down, the Fund can buy it back in the market and return it to the broker, making a profit. This strategy may be employed to hedge or offset long-only equity strategies of similar size in assets and volatility.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Long/Short Credit &amp; Fixed Income:</b> A long/short credit strategy combines long and short positions in debt securities of domestic and foreign governments, agencies, and companies of all maturities and qualities, including high yield (junk bonds) and Treasury Inflation-Protected Securities (&#8220;TIPS&#8221;), ETFs and emerging market debt. This strategy may invest in mortgage-backed securities, collateralized mortgage obligations, asset-backed securities and other mortgage related securities. The strategy may focus on short positions by utilizing instruments to anticipate the decline in the price of an overvalued security or type of security. Such hedging instruments could include individual bonds or related stocks, futures contracts or other instruments.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Global Macro and Emerging Markets:</b> A global macro and emerging markets strategy seek to profit from directional changes in currencies, stock markets, commodity prices and market volatility. This strategy may utilize positions held through individual securities, ETFs, derivative contracts, swaps or other financial instruments linked to major market, sector or country indices, fixed income securities, currencies and commodities. This strategy may invest in a limited number of securities, issuers, industries or countries which may result in higher volatility.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Managed Futures:</b> A managed futures strategy seeks to preserve capital through capturing opportunities in various futures markets. This strategy typically includes long positions in the futures that are showing strong upward momentum and short positions in the futures that are in a downward trend. This strategy may provide different exposures to many markets and thus offer low correlations with traditional stock and bond markets.</font></p> <p style="margin:3.5mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm; color:#003aa8;"><i>EVENT-DRIVEN STRATEGIES</i></font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Event-driven strategies seek to benefit from price movements caused by anticipated corporate events, such as mergers, acquisitions, spin-offs or other special situations. These strategies may include:</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Distressed Securities:</b> Investing in the securities of issuers in financial distress based upon the expectations of the manager as to whether a turnaround may materialize.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Special Situations:</b> Investing in the securities of issuers based upon the expectations of the manager as to whether the price of such securities may change in the short term due to a special situation, such as a stock buy-back, spin-off, bond upgrade or a positive earnings report.</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Merger Arbitrage:</b> Seeking to exploit price differentials in the shares of companies that are involved in announced corporate events, such as mergers, by assessing the likelihood that such events will be consummated as proposed.</font></p> <p style="margin:3.5mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm; color:#003aa8;"><i>ARBITRAGE STRATEGIES</i></font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Arbitrage strategies seek to exploit price differences in identical, related or similar securities on different markets or in different forms so as to minimize overall market risk. These strategies may include:</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Fixed Income or Interest Rate Arbitrage:</b> Buying and shorting different debt securities and/or futures contracts, including interest rate swap arbitrage, U.S. and non-U.S. bond arbitrage.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Convertible Arbitrage:</b> Seeking to exploit price differentials in the convertible bond markets by buying the convertible bond, and shorting the common stock, of the same company.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Pairs Trading:</b> Certain securities, often competitors in the same sector, are sometimes correlated in their day-to-day price movements. If the performance link breaks down, <i>i.e.</i>, one stock trades up while the other traded down, a manager may sell the outperforming stock and buy the underperforming one, based on the assumption that the &#8220;spread&#8221; between the two would eventually converge. This may help to hedge against market and sector risk.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Equity Market Neutral:</b> A market neutral strategy combines long and short equity positions to seek to keep its exposure to overall market risk very low. Such strategies take long positions in those securities believed to have attractive appreciation potential and short positions in those securities believed to have depreciation potential. This strategy is typically constructed to attempt to be beta-neutral and attempts to control one or more industry, sector, market capitalization or other potential market bias exposure.</font></p> <p style="margin:3.5mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm; color:#003aa8;"><i>ALLOCATION OF FUND ASSETS</i></font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Adviser determines the allocation of the Fund&#8217;s assets among the various Sub-Advisers and Underlying Funds. In selecting and weighting investment options, the Adviser seeks to identify Sub-Advisers and Underlying Funds which, based on their investment styles and historical performance, have the potential, in the opinion of the Adviser, to perform independently of each other and achieve positive risk-adjusted returns in various market cycles. This is referred to as &#8220;low correlation.&#8221; The degree of correlation of any given investment strategy of a Sub-Adviser or an Underlying Fund will, with other investment strategies and the market as a whole, vary as a result of market conditions and other factors, and some Sub-Advisers and Underlying Funds will have a greater degree of correlation with each other and with the market than others.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">By allocating its assets among a number of investment options, the Fund seeks to achieve diversification, less risk and lower volatility than if the Fund utilized a single manager or a single strategy approach. The Fund is not required to invest with any minimum number of Sub-Advisers or Underlying Funds, and does not have minimum or maximum limitations with respect to allocations of assets to any Sub-Adviser, investment strategy or market sector. The Adviser may change the allocation of the Fund&#8217;s assets among the available investment options, and may add or remove Sub-Advisers, at any time. For a variety of reasons, including capacity and regulatory limitations, not all the Sub-Advisers may be available to the Fund if it chooses to use them in the future.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Each Sub-Adviser is responsible for the day-to-day management of its allocated portion of Fund assets. The Adviser has ultimate responsibility, subject to the oversight of the Board of Trustees of the Fund, to oversee the Sub-Advisers, and to recommend their hiring, termination and replacement.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Adviser may hire and terminate Sub-Advisers in accordance with the terms of an exemptive order obtained by the Fund and the Adviser from the SEC, under which the Adviser is permitted, subject to supervision and approval of the Board of Trustees, to enter into and materially amend sub-advisory agreements without seeking shareholder approval. The Adviser will furnish shareholders of the Fund with information regarding a new Sub-Adviser within 90 days of the hiring of the new Sub-Adviser.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Currently, the Adviser has entered into sub-advisory agreements with the following six Sub-Advisers with respect to the Fund. Below is a description of each Sub-Adviser&#8217;s investment style. 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RISK/RETURN INVESTMENT OBJECTIVE <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The CM Commodity Index Fund seeks to track, before fees and expenses, the performance of the UBS Bloomberg Constant Maturity Commodity Total Return Index.</font></p> FUND FEES AND EXPENSES <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds. More information about these and other discounts is available from your financial professional and in the &#8220;Shareholder Information&#8221; section of the Fund&#8217;s prospectus and in the &#8220;Availability of Discounts&#8221; and &#8220;Breakpoint Linkage Rules for Discounts&#8221; sections of the Fund&#8217;s Statement of Additional Information (&#8220;SAI&#8221;).</font></p> 0.0575 0.0000 0.0000 0.0000 0.0000 0.0000 0.0075 0.0075 0.0075 0.0025 0.0000 0.0000 0.0052 0.0023 0.0052 0.0152 0.0098 0.0127 -0.0057 -0.0033 -0.0057 0.0095 0.0065 0.0070 ~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact cik0000768847_S000029608Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact cik0000768847_S000029608Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ 2012-05-01 You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds. More information about these and other discounts is available from your financial professional and in the "Shareholder Information" section of the Fund's prospectus and in the "Availability of Discounts" and "Breakpoint Linkage Rules for Discounts" sections of the Fund's Statement of Additional Information ("SAI"). Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 25000 Shareholder Fees (fees paid directly from your investment) Expense Example <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following 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 either redeem all of your shares at the end of these periods or continue to hold them. The example also assumes that your investment has a 5% return each year and that the Fund&#8217;s operating expenses remain the same. Although your actual expenses may be higher or lower, based on these assumptions, your costs would be:</font></p> 666 666 975 975 66 66 279 279 72 72 346 346 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact cik0000768847_S000029608Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption column dei_LegalEntityAxis compact cik0000768847_S000029608Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ Sold Held PORTFOLIO TURNOVER <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance.</font></p> PRINCIPAL INVESTMENT STRATEGIES <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund seeks to achieve its investment objective by investing in instruments that derive their value from the performance of the UBS Bloomberg Constant Maturity Commodity Total Return Index (the &#8220;CMCI&#8221;), as described below, and in bonds, debt securities and other fixed income instruments (&#8220;Fixed Income Instruments&#8221;) issued by various U.S. public- or private-sector entities. The Fund invests in commodity-linked derivative instruments, including commodity index-linked notes, swap agreements, commodity futures contracts and options on futures contracts that provide economic exposure to the investment returns of the commodities markets, as represented by the CMCI and its constituents. Commodities are assets that have tangible properties, such as oil, metals, and agricultural products. A commodity-linked derivative is a derivative instrument whose value is linked to the movement of a commodity, commodity index, commodity option or futures contract. The value of commodity-linked derivative instruments may be affected by overall market movements and other factors affecting the value of a particular industry or commodity, such as weather, disease, embargoes, or political and regulatory developments.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The CMCI is a rules-based, composite benchmark index diversified across 23 commodities from the following five sectors: energy, precious metals, industrial metals, agriculture and livestock. The CMCI is comprised of futures contracts with maturities ranging from around three months to over three years for each commodity, depending on liquidity. The overall return of the CMCI reflects a combination of (i)&#160;the returns on the futures contracts comprising the CMCI; and (ii)&#160;the daily fixed-income return that would be earned on a hypothetical portfolio of 91-day U.S. Treasury bills theoretically deposited as margin for the hypothetical positions in the futures contracts comprising the CMCI. The selection and relative weightings of the components of the CMCI are designed to reflect the economic significance and market liquidity of each commodity, as determined based on global economic data, consumption data, commodity futures prices, open interest and volume data. The maturity of each commodity component in the CMCI remains fixed at a predefined time interval at all times by means of a continuous rolling process, in which a weighted percentage of shorter dated contracts for each commodity are swapped for longer dated contracts on a daily basis. The CMCI is rebalanced monthly back to the target weightings of the commodity components of the CMCI and the target weightings of all commodity components are revised twice per year. A more detailed description of the CMCI is contained in Appendix A to the prospectus.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund will seek to track the returns of the CMCI by entering into swap contracts and commodity index-linked notes with one or more counterparties, which contracts and notes will rise and fall in value in response to changes in the value of the CMCI. As of the date of this prospectus, UBS was the only available counterparty with which the Fund may enter into such swap contracts on the CMCI. The Fund may enter into such contracts and notes directly or indirectly through a wholly-owned subsidiary of the Fund (the &#8220;Subsidiary&#8221;). Commodity index-linked notes are derivative debt instruments with principal and/or coupon payments linked to the performance of commodity indices (such as the CMCI). These commodity index-linked notes are sometimes referred to as &#8220;structured notes&#8221; because the terms of these notes may be structured by the issuer and the purchaser of the note. The Fund may also seek to gain exposure to the individual commodity components of the CMCI by investing in futures contracts that comprise the CMCI, either directly or indirectly through the Subsidiary.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">For tax reasons, it may be advantageous for the Fund to create and maintain its exposure to the commodity markets, in whole or in part, by investing in the Subsidiary. The Subsidiary has the same investment objective as the Fund and the portfolio of the Subsidiary is managed by the Adviser for the exclusive benefit of the Fund. As discussed in greater detail elsewhere in this prospectus, the Subsidiary (unlike the Fund) may invest without limitation in commodity-linked swap agreements and other commodity-linked derivative instruments including futures. The Fund may invest up to 25% of its assets in the Subsidiary.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The derivative instruments in which the Fund and the Subsidiary primarily intend to invest are instruments linked to commodity indices, such as the CMCI, and instruments linked to the value of a particular commodity or commodity futures contract, or a subset of commodities or commodity futures contracts. These instruments may specify exposure to commodity futures with different roll dates, reset dates or contract months than those specified by a particular commodity index. As a result, the commodity-linked derivatives component of the Fund&#8217;s portfolio may deviate from the returns of any particular commodity index. The Fund or the Subsidiary may over- weight or under-weight its exposure to a particular commodity index, or a subset of commodities, such that the Fund has greater or lesser exposure to that index than the value of the Fund&#8217;s net assets, or greater or lesser exposure to a subset of commodities than is represented by a particular commodity index. Such deviations may be the result of temporary market fluctuations, and under normal circumstances, the Fund will seek to maintain notional exposure to one or more commodity indices within 5% (plus or</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;">minus) of the value of the Fund&#8217;s net assets. To the extent the CMCI is concentrated in a particular industry (or one or more commodities that comprise an industry) the Fund will necessarily be concentrated in that industry.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Assets not invested in commodity-linked derivative instruments or the Subsidiary may be invested in Fixed Income Instruments, including derivative Fixed Income Instruments. The Fund is non-diversified, which means that it may invest its assets in a smaller number of issuers than a diversified fund.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The average duration of the portfolio of Fixed Income Instruments will vary based on interest rates and, under normal market conditions, is not expected to exceed five years. Duration is a measure of the expected life of a fixed income security that is used to determine the sensitivity of a security&#8217;s price to changes in interest rates. The longer a security&#8217;s duration, the more sensitive it will be to changes in interest rates. Similarly, a fund with a longer average portfolio duration will be more sensitive to changes in interest rates than a fund with a shorter average portfolio duration. By way of example, the price of a bond fund with an average duration of five years would be expected to fall approximately 5% if interest rates rose by one percentage point. The Fund will invest primarily in securities of the U.S. Government and its agencies and investment grade bonds of private issuers rated Baa or higher or, if unrated, determined by the Adviser to be of comparable quality. The Fund may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques (such as buy back or dollar rolls, repurchase agreements or reverse repurchase agreements). The Fund may also invest, without limitation, in money market funds.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Adviser may hire and terminate sub-advisers in accordance with the terms of an exemptive order obtained by the Fund and the Adviser from the SEC, under which the Adviser is permitted, subject to supervision and approval of the Board of Trustees, to enter into and materially amend sub-advisory agreements without seeking shareholder approval. The Adviser will furnish shareholders of the Fund with information regarding a new sub-adviser within 90 days of the hiring of the new sub-adviser. Currently, the Adviser has not hired a sub-adviser to assist with the portfolio management of the Fund.</font></p> PRINCIPAL RISKS <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">There is no assurance that the Fund will achieve its investment objective. The Fund&#8217;s share price and return will fluctuate with changes in the market value of the Fund&#8217;s portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Commodities and Commodity-Linked Derivatives.</b> Exposure to the commodities markets, such as precious metals, industrial metals, gas and other energy products and natural resources, may subject the Fund to greater volatility than investments in traditional securities. The commodities markets may fluctuate widely based on a variety of factors including changes in overall market movements, political and economic events and policies, war, acts of terrorism, natural disasters and changes in interest rates or inflation rates. Because the value of a commodity-linked derivative instrument and structured note typically are based upon the price movements of physical commodities, the value of these securities will rise or fall in response to changes in the underlying commodities or related index of investment.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Counterparty.</b> A loss may be sustained as a result of the failure of another party to a contract (usually referred to as a &#8220;counterparty&#8221;) to make required payments or otherwise comply with a contract&#8217;s terms. The Fund also bears the risk of loss of the amount expected to be received under a swap agreement in the event of the default or bankruptcy of a swap agreement counterparty. In addition, the Fund may enter into swap agreements with a limited number of counterparties, and as of the date of this prospectus, UBS was the only available counterparty with which the Fund may enter into such swap contracts on the CMCI. The Fund may invest in commodity- linked structured notes issued by a limited number of issuers that will act as counterparties. The Fund&#8217;s use of one or a limited number of counterparties and its investments in commodity-linked structured notes issued by only a limited number of issuers increases the Fund&#8217;s exposure to counterparty credit risk. Swap agreements also may be considered to be illiquid. Further, there is a risk that no suitable counterparties are willing to enter into, or continue to enter into, transactions with the Fund and, as a result, the Fund may not be able to achieve its investment objective.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Debt Securities.</b> Debt securities are subject to credit risk and interest rate risk. Credit risk refers to the possibility that the issuer of a debt security will be unable to make interest payments or repay principal when it becomes due. Interest rate risk refers to fluctuations in the value of a debt security resulting from changes in the general level of interest rates.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Derivatives.</b> The use of swap agreements, options, futures contracts and structured notes, presents risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. The use of derivatives can lead to losses because of adverse movements in the price or value of the underlying security, commodity, asset, index or reference rate. Derivative strategies often involve leverage, which may exaggerate a loss, potentially causing the Fund to lose more money than it would have lost had it invested in the underlying security. Also, a liquid secondary market may not always exist for the Fund&#8217;s derivative positions at times when the Fund might wish to terminate or sell such positions and over the counter instruments may be illiquid.</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Industry Concentration.</b> The Fund may be subject to greater risks and market fluctuations than a fund whose portfolio has exposure to a broader range of industries. The Fund may be susceptible to financial, economic, political or market events, as well as government regulation, impacting a particular industry.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Market.</b> Market risk refers to the risk that the market prices of securities, commodities and related instruments that the Fund holds will rise or fall, sometimes rapidly or unpredictably. In general, equity securities and commodities tend to have greater price volatility than debt securities.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Non-Diversification.</b> A non-diversified fund&#8217;s greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund&#8217;s portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Regulatory.</b> Changes in the laws or regulations of the United States or the Cayman Islands could affect the operations of the Fund or the Subsidiary and impair the ability of the Fund to achieve its investment objective. For example, the U.S. Commodity Futures Trading Commission (&#8220;CFTC&#8221;) recently proposed amendments to existing regulations that, if adopted as proposed, would subject the Fund&#8217;s activities involving investments in futures contracts and similar instruments to regulation by the CFTC.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Repurchase and Reverse Repurchase Agreements.</b> A repurchase agreement exposes the Fund to the risk that the party that sells the security may default on its obligation to repurchase it. The Fund may lose money if it cannot sell the security at the agreed-upon time and price or the security loses value before it can be sold. A reverse repurchase agreement involves the risk that the market value of the securities the Fund is obligated to repurchase under the agreement may decline below the repurchase price.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Subsidiary.</b> By investing in the Subsidiary, the Fund is indirectly exposed to the risks associated with the Subsidiary&#8217;s investments. There is no guarantee that the investment objective of the Subsidiary will be achieved.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Tracking Error.</b> The Fund&#8217;s return may not match the return of the CMCI due to, among other factors, the Fund incurring operating expenses, and not being fully invested at all times as a result of cash inflows and cash reserves to meet redemptions.</font></p> The Fund's share price and return will fluctuate with changes in the market value of the Fund's portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money. Non-Diversification. A non-diversified fund's greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund's portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio. PERFORMANCE <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund commenced operations on December 31, 2010. Accordingly, the Fund does not have a full calendar year of performance.</font></p> The Fund commenced operations on December 31, 2010. Accordingly, the Fund does not have a full calendar year of performance. 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Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse15false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Emerging Markets Fund seeks long-term capital appreciation by investing primarily in equity securities in emerging markets around the world.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. 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Shareholder Fees (fees paid directly from your investment) Example 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 you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be You would pay the following expenses if you did not redeem your shares The Example does not reflect sales charges (loads) on reinvested dividends [and other distributions]. If these sales charges (loads) were included, your costs would be higher. Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. 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 __% of the average value of its whole portfolio. Instructions. A.3.instructions.6 New Funds. For purposes of this Item, a "New Fund" is a Fund that does not include in Form N-1A financial statements reporting operating results or that includes financial statements for the Fund's initial fiscal year reporting operating results for a period of 6 months or less. The following Instructions apply to New Funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph d -Subsection instructions falsefalse17false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds. More information about these and other discounts is available from your financial professional and in the &#8220;Shareholder Information&#8221; section of the Fund&#8217;s prospectus and in the &#8220;Availability of Discounts&#8221; and &#8220;Breakpoint Linkage Rules for Discounts&#8221; sections of the Fund&#8217;s Statement of Additional Information (&#8220;SAI&#8221;).</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse18false0rr_ShareholderFeesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Shareholder Fees (fees paid directly from your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subsection table falsefalse19false0rr_OperatingExpensesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 7 -Subsection table falsefalse20false0rr_FeeWaiverOrReimbursementOverAssetsDateOfTerminationrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002012-05-01falsefalsefalsefalsefalseOtherus-types:dateStringItemTypenormalizedstringThis element represents the date of expected termination of any expense reimbursement or fee waiver arrangements that reduce any Fund operating expenses (SEC Form N-1A 2006-09-14 A.3.table.1.11 Total Annual Fund Operating Expenses A.3.instructions.3.e).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph e -Subsection instructions falsefalse21false0rr_PortfolioTurnoverHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PORTFOLIO TURNOVERfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 5 -Subsection instructions falsefalse22false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 110% of the average value of its portfolio.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalse23false0rr_PortfolioTurnoverRaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse1.101.10falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureThis element represents the rate of portfolio turnover presented as a percentage (SEC Form N-1A 2006-09-14 A.3.example.3 Portfolio Turnover A.3.instructions.5 Portfolio Turnover).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalse24false0rr_ExpenseBreakpointDiscountsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds.More information about these and other discounts is available from your financial professional and in the "Shareholder Information" section of the Fund's prospectus and in the "Availability of Discounts" and "Breakpoint Linkage Rules for Discounts" sections of the Fund's Statement of Additional Information ("SAI").falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInclude the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse25false0rr_ExpenseBreakpointMinimumInvestmentRequiredAmountrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2500025000falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents the minimum level of investment required to qualify for discounted sales charges or fund expenses (SEC Form N-1A 2006-09-14 A.3.instructions.1.b).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse26false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Expense ExamplefalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse27false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following 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 either redeem all of your shares at the end of these periods or continue to hold them. The example also assumes that your investment has a 5% return each year and that the Fund&#8217;s operating expenses remain the same. Although your actual expenses may be higher or lower, based on these assumptions, your costs would be:</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThe Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection example falsefalse28false0rr_ExpenseExampleByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00SoldfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse29false0rr_ExpenseExampleNoRedemptionByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00HeldfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse30false0rr_StrategyHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL INVESTMENT STRATEGIESfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse31false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Under normal conditions, the Fund invests at least 80% of its net assets in securities of companies that are organized in, maintain at least 50% of their assets in, or derive at least 50% of their revenues from, emerging market countries. An emerging market country is any country that has been determined by an international organization, such as the World Bank, to have a low to middle income economy. The Fund is considered to be &#8220;non-diversified&#8221; which means that it may invest in fewer securities than a &#8220;diversified&#8221; fund.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Utilizing qualitative and quantitative measures, the Fund&#8217;s portfolio manager selects companies that have growth potential, specifically focusing on small- to mid- capitalization companies. Candidates for the Fund&#8217;s portfolio are ranked based on their relative desirability based on a wide range of financial criteria and are regularly reviewed to ensure that they continue to meet the ranking and desirability criteria.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund&#8217;s holdings may include issues denominated in currencies of emerging countries, investment companies (like country funds) that invest in emerging countries, and American Depositary Receipts, and similar types of investments, representing emerging markets securities.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may use derivative instruments, such as structured notes, futures, options and swap agreements, to gain or hedge exposure.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may invest up to 20% of its net assets in securities issued by other investment companies, including exchange-traded funds (&#8220;ETFs&#8221;). The Fund may also invest in money market funds, but these investments are not subject to this limitation. The Fund may invest in ETFs to participate in, or gain rapid exposure to, certain market sectors, or when direct investments in certain countries are not permitted.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse32false0rr_RiskHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL RISKSfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subsection b falsefalse33false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">There is no assurance that the Fund will achieve its investment objective. The Fund&#8217;s share price and return will fluctuate with changes in the market value of the Fund&#8217;s portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Derivatives.</b> The use of derivatives, such as swap agreements, options, warrants, futures contracts, currency forwards and structured notes, presents risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. The use of derivatives can lead to losses because of adverse movements in the price or value of the underlying security, asset, index or reference rate. Derivative strategies often involve leverage, which may exaggerate a loss, potentially causing a Fund to lose more money than it would have lost had it invested in the underlying security. Also, a liquid secondary market may not always exist for the Fund&#8217;s derivative positions at times when the Fund might wish to terminate or sell such positions and over the counter instruments may be illiquid.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Direct Investments.</b> Direct investments may involve a high degree of business and financial risk that can result in substantial losses. Because of the absence of any public trading market for these investments, a Fund may take longer to liquidate these positions than would be the case for publicly traded securities. Direct investments are generally considered illiquid and will be aggregated with other illiquid investments for purposes of the limitation on illiquid investments.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Emerging Markets Securities.</b> Emerging markets securities typically present even greater exposure to the risks described under &#8220;Foreign Securities&#8221; and may be particularly sensitive to certain economic changes. Emerging markets securities are exposed to a number of risks that may make these investments volatile in price or difficult to trade.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Foreign Currency Transactions.</b> An investment transacted in a foreign currency may lose value due to fluctuations in the rate of exchange. These fluctuations can make the return on an investment go up or down, entirely apart from the quality or performance of the investment itself.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Foreign Securities.</b> Foreign investments are subject to greater risks than U.S. domestic investments. These additional risks may include exchange rate fluctuations and exchange controls; less publicly available information; more volatile or less liquid securities markets; and the possibility of arbitrary action by foreign governments, or political, economic or social instability. Foreign companies also may be subject to significantly higher levels of taxation than U.S. companies, including potentially confiscatory levels of taxation, thereby reducing the earnings potential of such foreign companies.</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Investments in Other Investment Companies.</b> A Fund&#8217;s investment in another investment company may subject the Fund indirectly to the underlying risks of the investment company. The Fund also will bear its share of the underlying investment company&#8217;s fees and expenses, which are in addition to the Fund&#8217;s own fees and expenses.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Market.</b> Market risk refers to the risk that the market prices of securities that a Fund holds will rise or fall, sometimes rapidly or unpredictably. In general, equity securities tend to have greater price volatility than debt securities.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Non-Diversification.</b> A non-diversified fund&#8217;s greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund&#8217;s portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Small- and Medium-Capitalization Companies.</b> Securities of small- and medium-sized companies often have greater price volatility, lower trading volume and less liquidity than larger more established companies. The stocks of small- and medium-sized companies may have returns that vary, sometimes significantly, from the overall stock market.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringNarrative Risk Disclosure. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Clause instruction -Subsection b falsefalse34false0rr_RiskLoseMoneyrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00The Fund's share price and return will fluctuate with changes in the market value of the Fund's portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringSummarize the principal risks of investing in the Fund, including the risks to which the Fund's portfolio as a whole is subject and the circumstances reasonably likely to affect adversely the Fund's net asset value, yield, and total return. Unless the Fund is a Money Market Fund, disclose that loss of money is a risk of investing in the Fund. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Subsection b falsefalse35false0rr_RiskNondiversifiedStatusrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Non-Diversification. A non-diversified fund's greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund's portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIf applicable, state that the Fund is non-diversified, describe the effect of non-diversification (e.g., disclose that, compared with other funds, the Fund may invest a greater percentage of its assets in a particular issuer), and summarize the risks of investing in a non-diversified fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph iv -Subsection b falsefalse36false0rr_BarChartAndPerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PERFORMANCEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse37false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund&#8217;s performance from year to year and by showing how the Fund&#8217;s average annual total returns compare with those of a broad measure of market performance and one or more other performance measures. For instance, the Morgan Stanley Capital International (MSCI) Emerging Markets Index, calculated with dividends reinvested, captures 60% of the publicly traded equities in each industry for approximately 25 emerging markets. The Fund&#8217;s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. The annual returns in the bar chart are for the Fund&#8217;s Class&#160;A shares and do not reflect sales loads. If sales loads were reflected, returns would be less than those shown.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Additionally, large purchases and/or redemptions of shares of a class, relative to the amount of assets represented by the class, may cause the annual returns for each class to differ. Updated performance information for the Fund is available on the Van Eck website at vaneck.com.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse38false0rr_PerformanceInformationIllustratesVariabilityOfReturnsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00The following chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance and one or more other performance measures.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInclude the bar chart and table required by paragraphs (b)(2)(ii) and (iii) of this section. Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph i -Subsection b falsefalse39false0rr_PerformanceAvailabilityWebSiteAddressrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00vaneck.comfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIf applicable, include a statement explaining that updated performance information is available and providing a Website address and/or toll-free (or collect) telephone number where the updated information may be obtained.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph i -Subsection b falsefalse40false0rr_PerformancePastDoesNotIndicateFuturerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInclude the bar chart and table required by paragraphs (b)(2)(ii) and (iii) of this section. Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph i -Subsection b falsefalse41false0rr_BarChartHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00CLASS A: Annual Total Returns (%) as of 12/31falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse42false0rr_BarChartNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p align="center"><font style="font-family:sans-serif; font-size:3.5mm;"></font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringProvide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph i -Subsection b falsefalse43false0rr_BarChartClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<table cellspacing="0" style="margin-left:0.00%;margin-right:0.00%;width:100.00%;"> <tr valign="top"> <td style="width:13.69%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:8.73%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:77.58%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> </tr> <tr valign="top"> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Best Quarter:</b></font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">+59.06%</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">2Q &#8217;09</font></p> </td> </tr> <tr valign="top"> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Worst Quarter:</b></font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">-38.59%</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">4Q &#8217;08</font></p> </td> </tr> </table>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse44false0rr_HighestQuarterlyReturnLabelrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Best QuarterfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse45false0rr_BarChartHighestQuarterlyReturnDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002009-06-30falsefalsetruefalsefalseOtherxbrli:dateItemTypedateIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse46false0rr_BarChartHighestQuarterlyReturnrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.59060.5906falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse47false0rr_LowestQuarterlyReturnLabelrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Worst QuarterfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse48false0rr_BarChartLowestQuarterlyReturnDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002008-12-31falsefalsetruefalsefalseOtherxbrli:dateItemTypedateIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse49false0rr_BarChartLowestQuarterlyReturnrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.3859-0.3859falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse50false0rr_PerformanceTableUsesHighestFederalRaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00After 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.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringProvide a brief explanation that 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.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Subsection b falsefalse51false0rr_PerformanceTableNotRelevantToTaxDeferredrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-deferred account, such as a 401(k) plan or Investment Retirement Account.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringProvide a brief explanation that the actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iv -Clause B -Subsection b falsefalse52false0rr_PerformanceTableOneClassOfAfterTaxShownrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00These returns are shown for one class of shares only; after tax-returns for the other classes may vary.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringProvide a brief explanation that if the Fund is a Multiple Class Fund that offers more than one Class in the prospectus, after-tax returns are shown for only one Class and after-tax returns for other Classes will vary.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Subsection b Reference 2: 2 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iv -Clause C -Subsection b falsefalse53false0rr_AverageAnnualReturnCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Average Annual Total Returns as of 12/31/10falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 5 -Subsection b falsefalse54false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse3falsefalseUSDtruefalse{dei_LegalEntityAxis} : Emerging Markets Fund {rr_ProspectusShareClassAxis} : Class A (Emerging Markets Fund) 4/14/2011 - 4/14/2011 USD ($) $c2_S000009198Member_C000024992Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024992Memberrr_ProspectusShareClassAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse55true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse56false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse57false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse58false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00750.0075falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse59false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse60false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00740.0074falsefalsefalsefalsefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse61false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01740.0174falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse62false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000[1]falsefalsefalsefalsefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse63false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01740.0174falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse64false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue742742falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse65false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue10911091falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse66false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue14641464falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse67false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue25092509falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse68false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue742742falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse69false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue10911091falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse70false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue14641464falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse71false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue25092509falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse72false0rr_AnnualReturn2001rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.2732-0.2732falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse73false0rr_AnnualReturn2002rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.2504-0.2504falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse74false0rr_AnnualReturn2003rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.75050.7505falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse75false0rr_AnnualReturn2004rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.19790.1979falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse76false0rr_AnnualReturn2005rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.29770.2977falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse77false0rr_AnnualReturn2006rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.38980.3898falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse78false0rr_AnnualReturn2007rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.35660.3566falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse79false0rr_AnnualReturn2008rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.6812-0.6812falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse80false0rr_AnnualReturn2009rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse1.20371.2037falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse81false0rr_AnnualReturn2010rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.28170.2817falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse82false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.20830.2083falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse83false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.09850.0985falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse84false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.09020.0902falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse85false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse001993-12-20falsefalsetruefalsefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalse86false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse4falsefalsetruefalse{dei_LegalEntityAxis} : Emerging Markets Fund {rr_ProspectusShareClassAxis} : Class A (Emerging Markets Fund) {rr_PerformanceMeasureAxis} : After Taxes on Distributions 4/14/2011 - 4/14/2011 c6_S000009198Member_AfterTaxesOnDistributionsMember_C000024992Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024992Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseAfter Taxes on Distributionsrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsMemberrr_PerformanceMeasureAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0OthernaNo definition available.No authoritative reference available.falsefalse87true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse88false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.20720.2072[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse89false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.08460.0846[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse90false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.07910.0791[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse91false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00&nbsp;[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse92false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse5falsefalsetruefalse{dei_LegalEntityAxis} : Emerging Markets Fund {rr_ProspectusShareClassAxis} : Class A (Emerging Markets Fund) {rr_PerformanceMeasureAxis} : After Taxes on Distributions and Sales 4/14/2011 - 4/14/2011 c7_S000009198Member_AfterTaxesOnDistributionsAndSalesMember_C000024992Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024992Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseAfter Taxes on Distributions and Salesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsAndSalesMemberrr_PerformanceMeasureAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0OthernaNo definition available.No authoritative reference available.falsefalse93true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse94false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.13540.1354[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse95false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.07980.0798[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse96false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.07480.0748[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse97false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00&nbsp;[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse98false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse6falsefalseUSDtruefalse{dei_LegalEntityAxis} : Emerging Markets Fund {rr_ProspectusShareClassAxis} : Class C (Emerging Markets Fund) 4/14/2011 - 4/14/2011 USD ($) $c3_S000009198Member_C000024993Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024993Memberrr_ProspectusShareClassAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170ratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse99true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse100false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse101false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01000.0100falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse102false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00750.0075falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse103false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01000.0100falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse104false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00860.0086falsefalsefalsefalsefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse105false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.02610.0261falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse106false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0011-0.0011[1]falsefalsefalsefalsefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse107false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.02500.0250falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse108false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue353353falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse109false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue801801falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse110false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue13751375falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse111false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue29362936falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse112false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue253253falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse113false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue801801falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse114false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue13751375falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse115false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue29362936falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse116false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.26160.2616falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse117false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.10360.1036falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse118false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.15710.1571falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse119false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse002003-10-03falsefalsetruefalsefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalse120false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse7falsefalseUSDtruefalse{dei_LegalEntityAxis} : Emerging Markets Fund {rr_ProspectusShareClassAxis} : Class I (Emerging Markets Fund) 4/14/2011 - 4/14/2011 USD ($) $c4_S000009198Member_C000033045Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000033045Memberrr_ProspectusShareClassAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse121true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse122false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse123false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse124false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00750.0075falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse125false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse126false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01480.0148falsefalsefalsefalsefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse127false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.02230.0223falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse128false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0098-0.0098[1]falsefalsefalsefalsefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse129false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01250.0125falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse130false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue127127falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse131false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue603603falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse132false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue11051105falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse133false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue24882488falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse134false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue127127falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse135false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue603603falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse136false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue11051105falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse137false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue24882488falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse138false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.28750.2875falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse139false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0272-0.0272falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse140false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse002007-12-31falsefalsetruefalsefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalse141false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse8falsefalseUSDtruefalse{dei_LegalEntityAxis} : Emerging Markets Fund {rr_ProspectusShareClassAxis} : Class Y (Emerging Markets Fund) 4/14/2011 - 4/14/2011 USD ($) $c5_S000009198Member_C000088110Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088110Memberrr_ProspectusShareClassAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170ratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse142true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse143false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse144false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse145false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00750.0075falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse146false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse147false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00980.0098falsefalsefalsefalsefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse148false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01730.0173falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse149false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0003-0.0003[1]falsefalsefalsefalsefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse150false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01700.0170falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse151false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue173173falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse152false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue542542falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse153false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue936936falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse154false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue20382038falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse155false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue173173falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse156false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue542542falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse157false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue936936falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse158false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue20382038falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse159false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.21480.2148falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse160false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse002010-05-01falsefalsetruefalsefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalse161false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse9falsefalsetruefalse{dei_LegalEntityAxis} : Emerging Markets Fund {rr_PerformanceMeasureAxis} : MSCI_Emerging_Markets_Index 4/14/2011 - 4/14/2011 c8_S000009198Member_MSCI_Emerging_Markets_IndexMemberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseMSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_MSCI_Emerging_Markets_IndexMemberrr_PerformanceMeasureAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0OthernaNo definition available.No authoritative reference available.falsefalse162true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse163false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.19200.1920falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse164false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.13100.1310falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse165false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.16210.1621falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse166false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse10falsefalseUSDtruefalse{dei_LegalEntityAxis} : Global Hard Assets Fund 4/14/2011 - 4/14/2011 USD ($) $c9_S000009200Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170ratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse167true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse168false0rr_RiskReturnHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00RISK/RETURNfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Investment Objectives/Goals Include the following information, in plain English under rule 421(d) under the Securities Act, in the order and subject matter indicatedReference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 falsefalse169false0rr_ObjectiveHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00INVESTMENT OBJECTIVEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse170false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Global Hard Assets Fund seeks long-term capital appreciation by investing primarily in hard asset securities. Income is a secondary consideration.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse171false0rr_ExpenseHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00FUND FEES AND EXPENSESfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Fee Table Includes the following information, in plain English under rule 421(d) under the Securities Act, after Item 2 Fees and expenses of the Fund This table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Shareholder Fees (fees paid directly from your investment) Example 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 you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be You would pay the following expenses if you did not redeem your shares The Example does not reflect sales charges (loads) on reinvested dividends [and other distributions]. If these sales charges (loads) were included, your costs would be higher. Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. 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 __% of the average value of its whole portfolio. Instructions. A.3.instructions.6 New Funds. For purposes of this Item, a "New Fund" is a Fund that does not include in Form N-1A financial statements reporting operating results or that includes financial statements for the Fund's initial fiscal year reporting operating results for a period of 6 months or less. The following Instructions apply to New Funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph d -Subsection instructions falsefalse172false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds. More information about these and other discounts is available from your financial professional and in the &#8220;Shareholder Information&#8221; section of the Fund&#8217;s prospectus and in the &#8220;Availability of Discounts&#8221; and &#8220;Breakpoint Linkage Rules for Discounts&#8221; sections of the Fund&#8217;s SAI.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse173false0rr_ShareholderFeesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Shareholder Fees (fees paid directly from your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subsection table falsefalse174false0rr_OperatingExpensesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 7 -Subsection table falsefalse175false0rr_FeeWaiverOrReimbursementOverAssetsDateOfTerminationrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002012-05-01falsefalsefalsefalsefalseOtherus-types:dateStringItemTypenormalizedstringThis element represents the date of expected termination of any expense reimbursement or fee waiver arrangements that reduce any Fund operating expenses (SEC Form N-1A 2006-09-14 A.3.table.1.11 Total Annual Fund Operating Expenses A.3.instructions.3.e).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph e -Subsection instructions falsefalse176false0rr_PortfolioTurnoverHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PORTFOLIO TURNOVERfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 5 -Subsection instructions falsefalse177false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 66% of the average value of its portfolio.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalse178false0rr_PortfolioTurnoverRaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.660.66falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureThis element represents the rate of portfolio turnover presented as a percentage (SEC Form N-1A 2006-09-14 A.3.example.3 Portfolio Turnover A.3.instructions.5 Portfolio Turnover).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalse179false0rr_ExpenseBreakpointDiscountsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds. More information about these and other discounts is available from your financial professional and in the "Shareholder Information" section of the Fund's prospectus and in the "Availability of Discounts" and "Breakpoint Linkage Rules for Discounts" sections of the Fund's SAI.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInclude the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse180false0rr_ExpenseBreakpointMinimumInvestmentRequiredAmountrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2500025000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents the minimum level of investment required to qualify for discounted sales charges or fund expenses (SEC Form N-1A 2006-09-14 A.3.instructions.1.b).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse181false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Expense ExamplefalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse182false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following 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 either redeem all of your shares at the end of these periods or continue to hold them. The example also assumes that your investment has a 5% return each year and that the Fund&#8217;s operating expenses remain the same. Although your actual expenses may be higher or lower, based on these assumptions, your costs would be:</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThe Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection example falsefalse183false0rr_ExpenseExampleByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00SoldfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse184false0rr_ExpenseExampleNoRedemptionByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00HeldfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse185false0rr_StrategyHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL INVESTMENT STRATEGIESfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse186false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Under normal conditions, the Fund invests at least 80% of its net assets in securities of &#8220;hard asset&#8221; companies and instruments that derive their value from &#8220;hard assets&#8221;. Hard assets include precious metals (including gold), base and industrial metals, energy, natural resources and other commodities. A hard assets company is a company that derives, directly or indirectly, at least 50% of its revenues from exploration, development, production, distribution or facilitation of processes relating to hard assets. The Fund concentrates its investments in the securities of hard assets companies and instruments that derive their value from hard assets. The Fund is considered to be &#8220;non-diversified&#8221; which means that it may invest in fewer securities than a &#8220;diversified&#8221; fund.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may invest without limitation in any one hard asset sector and is not required to invest any portion of its assets in any one hard asset sector. The Fund may invest in securities of companies located anywhere in the world, including the U.S. Under ordinary circumstances, the Fund will invest in securities of issuers from a number of different countries, and may invest any amount of its assets in emerging markets. The Fund may invest in securities of companies of any capitalization range. Utilizing qualitative and quantitative measures, the Fund&#8217;s investment management team selects equity securities of companies that it believes represent value opportunities and/or that have growth potential. Candidates for the Fund&#8217;s portfolio are evaluated based on their relative desirability using a wide range of criteria and are regularly reviewed to ensure that they continue to offer absolute and relative desirability.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may use derivative instruments, such as structured notes, futures, options and swap agreements, to gain or hedge exposure to hard assets, hard asset companies and other assets. The Fund may enter into foreign currency transactions to attempt to moderate the effect of currency fluctuations. The Fund may write covered call options on portfolio securities to the extent that the value of all securities with respect to which covered calls are written does not exceed 10% of the Fund&#8217;s net asset value. The Fund may also invest up to 20% of its net assets in securities issued by other investment companies, including exchange-traded funds (&#8220;ETFs&#8221;). The Fund may also invest in money market funds, but these investments are not subject to this limitation. The Fund may invest in ETFs to participate in, or gain rapid exposure to, certain market sectors, or when direct investments in certain countries are not permitted.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse187false0rr_RiskHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL RISKSfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subsection b falsefalse188false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">There is no assurance that the Fund will achieve its investment objective. The Fund&#8217;s share price and return will fluctuate with changes in the market value of the Fund&#8217;s portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Commodities and Commodity-Linked Derivatives.</b> Exposure to the commodities markets, such as precious metals, industrial metals, gas and other energy products and natural resources, may subject a Fund to greater volatility than investments in traditional securities. The commodities markets may fluctuate widely based on a variety of factors including changes in overall market movements, political and economic events and policies, war, acts of terrorism and changes in interest rates or inflation rates. Because the value of a commodity-linked derivative instrument and structured note typically are based upon the price movements of physical commodities, the value of these securities will rise or fall in response to changes in the underlying commodities or related index of investment.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Derivatives.</b> The use of derivatives, such as swap agreements, options, warrants, futures contracts, currency forwards and structured notes, presents risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. The use of derivatives can lead to losses because of adverse movements in the price or value of the underlying security, asset, index or reference rate. Derivative strategies often involve leverage, which may exaggerate a loss, potentially causing a Fund to lose more money than it would have lost had it invested in the underlying security. Also, a liquid secondary market may not always exist for the Fund&#8217;s derivative positions at times when the Fund might wish to terminate or sell such positions and over the counter instruments may be illiquid.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Direct Investments.</b> Direct investments may involve a high degree of business and financial risk that can result in substantial losses. Because of the absence of any public trading market for these investments, a Fund may take longer to liquidate these positions than would be the case for publicly traded securities. Direct investments are generally considered illiquid and will be aggregated with other illiquid investments for purposes of the limitation on illiquid investments.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Emerging Markets Securities.</b> Emerging markets securities typically present even greater exposure to the risks described under &#8220;Foreign Securities&#8221; and may be particularly sensitive to certain economic changes. Emerging markets securities are exposed to a number of risks that may make these investments volatile in price or difficult to trade.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Foreign Currency Transactions.</b> An investment transacted in a foreign currency may lose value due to fluctuations in the rate of exchange. These fluctuations can make the return on an investment go up or down, entirely apart from the quality or performance of the investment itself.</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Foreign Securities.</b> Foreign investments are subject to greater risks than U.S. domestic investments. These additional risks may include exchange rate fluctuations and exchange controls; less publicly available information; more volatile or less liquid securities markets; and the possibility of arbitrary action by foreign governments, or political, economic or social instability. Foreign companies also may be subject to significantly higher levels of taxation than U.S. companies, including potentially confiscatory levels of taxation, thereby reducing the earnings potential of such foreign companies.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Hard Assets Sectors.</b> The Fund may be subject to greater risks and market fluctuations than a fund whose portfolio has exposure to a broader range of sectors. The Fund may be susceptible to financial, economic, political or market events, as well as government regulation, impacting the hard assets sectors (such as the energy, metals and real estate sectors). Precious metals and natural resources securities are at times volatile and there may be sharp fluctuations in prices, even during periods of rising prices.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Investments in Other Investment Companies.</b> A Fund&#8217;s investment in another investment company may subject the Fund indirectly to the underlying risks of the investment company. The Fund also will bear its share of the underlying investment company&#8217;s fees and expenses, which are in addition to the Fund&#8217;s own fees and expenses.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Market.</b> Market risk refers to the risk that the market prices of securities that a Fund holds will rise or fall, sometimes rapidly or unpredictably. In general, equity securities tend to have greater price volatility than debt securities.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Non-Diversification.</b> A non-diversified fund&#8217;s greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund&#8217;s portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Small- and Medium-Capitalization Companies.</b> Securities of small- and medium-sized companies often have greater price volatility, lower trading volume and less liquidity than larger more established companies. The stocks of small<i>-</i> and medium-sized companies may have returns that vary, sometimes significantly, from the overall stock market.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringNarrative Risk Disclosure. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Clause instruction -Subsection b falsefalse189false0rr_RiskLoseMoneyrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00The Fund's share price and return will fluctuate with changes in the market value of the Fund's portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringSummarize the principal risks of investing in the Fund, including the risks to which the Fund's portfolio as a whole is subject and the circumstances reasonably likely to affect adversely the Fund's net asset value, yield, and total return. Unless the Fund is a Money Market Fund, disclose that loss of money is a risk of investing in the Fund. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Subsection b falsefalse190false0rr_RiskNondiversifiedStatusrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Non-Diversification. A non-diversified fund's greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund's portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIf applicable, state that the Fund is non-diversified, describe the effect of non-diversification (e.g., disclose that, compared with other funds, the Fund may invest a greater percentage of its assets in a particular issuer), and summarize the risks of investing in a non-diversified fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph iv -Subsection b falsefalse191false0rr_BarChartAndPerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PERFORMANCEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse192false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund&#8217;s performance from year to year and by showing how the Fund&#8217;s average annual total returns compare with those of a broad measure of market performance and one or more other performance measures. For instance, the S&amp;P North American Natural Resources Sector Index includes mining, energy, paper and forest products, and plantation-owning companies. The Fund&#8217;s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. The annual returns in the bar chart are for the Fund&#8217;s Class&#160;A shares and do not reflect sales loads. If sales loads were reflected, returns would be less than those shown.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Additionally, large purchases and/or redemptions of shares of a class, relative to the amount of assets represented by the class, may cause the annual returns for each class to differ. Updated performance information for the Fund is available on the Van Eck website at vaneck.com.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse193false0rr_PerformanceInformationIllustratesVariabilityOfReturnsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00The following chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance and one or more other performance measures.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInclude the bar chart and table required by paragraphs (b)(2)(ii) and (iii) of this section. Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph i -Subsection b falsefalse194false0rr_PerformanceAvailabilityWebSiteAddressrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00vaneck.comfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIf applicable, include a statement explaining that updated performance information is available and providing a Website address and/or toll-free (or collect) telephone number where the updated information may be obtained.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph i -Subsection b falsefalse195false0rr_PerformancePastDoesNotIndicateFuturerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInclude the bar chart and table required by paragraphs (b)(2)(ii) and (iii) of this section. Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph i -Subsection b falsefalse196false0rr_BarChartHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00CLASS A: Annual Total Returns (%) as of 12/31falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse197false0rr_BarChartNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p align="center"><font style="font-family:sans-serif; font-size:3.5mm;"></font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringProvide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph i -Subsection b falsefalse198false0rr_BarChartClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<table cellspacing="0" style="margin-left:0.00%;margin-right:0.00%;width:100.00%;"> <tr valign="top"> <td style="width:13.69%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:8.73%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:77.58%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> </tr> <tr valign="top"> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Best Quarter:</b></font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">+24.25%</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">3Q &#8217;05</font></p> </td> </tr> <tr valign="top"> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Worst Quarter:</b></font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">-35.78%</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">3Q &#8217;08</font></p> </td> </tr> </table>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse199false0rr_HighestQuarterlyReturnLabelrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Best QuarterfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse200false0rr_BarChartHighestQuarterlyReturnDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002005-09-30falsefalsetruefalsefalseOtherxbrli:dateItemTypedateIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse201false0rr_BarChartHighestQuarterlyReturnrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.24250.2425falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse202false0rr_LowestQuarterlyReturnLabelrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Worst QuarterfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse203false0rr_BarChartLowestQuarterlyReturnDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002008-09-30falsefalsetruefalsefalseOtherxbrli:dateItemTypedateIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse204false0rr_BarChartLowestQuarterlyReturnrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.3578-0.3578falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse205false0rr_PerformanceTableUsesHighestFederalRaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00After 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.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringProvide a brief explanation that 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.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Subsection b falsefalse206false0rr_PerformanceTableNotRelevantToTaxDeferredrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-deferred account, such as a 401(k) plan or Investment Retirement Account.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringProvide a brief explanation that the actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iv -Clause B -Subsection b falsefalse207false0rr_PerformanceTableOneClassOfAfterTaxShownrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00These returns are shown for one class of shares only; after tax-returns for the other classes may vary.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringProvide a brief explanation that if the Fund is a Multiple Class Fund that offers more than one Class in the prospectus, after-tax returns are shown for only one Class and after-tax returns for other Classes will vary.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Subsection b Reference 2: 2 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iv -Clause C -Subsection b falsefalse208false0rr_AverageAnnualReturnCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Average Annual Total Returns as of 12/31/10falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 5 -Subsection b falsefalse209false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse11falsefalseUSDtruefalse{dei_LegalEntityAxis} : Global Hard Assets Fund {rr_ProspectusShareClassAxis} : Class A (Global Hard Assets Fund) 4/14/2011 - 4/14/2011 USD ($) $c10_S000009200Member_C000024996Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024996Memberrr_ProspectusShareClassAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse210true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse211false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse212false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse213false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00980.0098falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse214false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse215false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00190.0019falsefalsefalsefalsefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse216false0rr_AcquiredFundFeesAndExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00010.0001falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse217false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01430.0143falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse218false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0004-0.0004[3]falsefalsefalsefalsefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse219false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01390.0139falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse220false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue708708falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse221false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue998998falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse222false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue13081308falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse223false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue21862186falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse224false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue708708falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse225false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue998998falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse226false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue13081308falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse227false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue21862186falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse228false0rr_AnnualReturn2001rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.0856-0.0856falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse229false0rr_AnnualReturn2002rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.06770.0677falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse230false0rr_AnnualReturn2003rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.42440.4244falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse231false0rr_AnnualReturn2004rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.22870.2287falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse232false0rr_AnnualReturn2005rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.48720.4872falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse233false0rr_AnnualReturn2006rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.22860.2286falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse234false0rr_AnnualReturn2007rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.42620.4262falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse235false0rr_AnnualReturn2008rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.4468-0.4468falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse236false0rr_AnnualReturn2009rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.52460.5246falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse237false0rr_AnnualReturn2010rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.28430.2843falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse238false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.21040.2104falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse239false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.12330.1233falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse240false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.16350.1635falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse241false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse001994-11-02falsefalsetruefalsefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalse242false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse12falsefalsetruefalse{dei_LegalEntityAxis} : Global Hard Assets Fund {rr_ProspectusShareClassAxis} : Class A (Global Hard Assets Fund) {rr_PerformanceMeasureAxis} : After Taxes on Distributions 4/14/2011 - 4/14/2011 c14_S000009200Member_AfterTaxesOnDistributionsMember_C000024996Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024996Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseAfter Taxes on Distributionsrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsMemberrr_PerformanceMeasureAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0OthernaNo definition available.No authoritative reference available.falsefalse243true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse244false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.20860.2086[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse245false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.11440.1144[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse246false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.15890.1589[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse247false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00&nbsp;[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse248false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse13falsefalsetruefalse{dei_LegalEntityAxis} : Global Hard Assets Fund {rr_ProspectusShareClassAxis} : Class A (Global Hard Assets Fund) {rr_PerformanceMeasureAxis} : After Taxes on Distributions and Sales 4/14/2011 - 4/14/2011 c15_S000009200Member_AfterTaxesOnDistributionsAndSalesMember_C000024996Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024996Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseAfter Taxes on Distributions and Salesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsAndSalesMemberrr_PerformanceMeasureAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0OthernaNo definition available.No authoritative reference available.falsefalse249true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse250false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.13670.1367[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse251false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.10420.1042[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse252false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.14690.1469[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse253false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00&nbsp;[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse254false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse14falsefalseUSDtruefalse{dei_LegalEntityAxis} : Global Hard Assets Fund {rr_ProspectusShareClassAxis} : Class C (Global Hard Assets Fund) 4/14/2011 - 4/14/2011 USD ($) $c11_S000009200Member_C000024997Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024997Memberrr_ProspectusShareClassAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170ratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse255true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse256false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse257false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01000.0100falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse258false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00980.0098falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse259false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01000.0100falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse260false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00170.0017falsefalsefalsefalsefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse261false0rr_AcquiredFundFeesAndExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00010.0001falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse262false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.02160.0216falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse263false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000[3]falsefalsefalsefalsefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse264false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.02160.0216falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse265false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue319319falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse266false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue676676falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse267false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue11591159falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse268false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue24932493falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse269false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue219219falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse270false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue676676falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse271false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue11591159falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse272false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue24932493falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse273false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.26440.2644falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse274false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.12810.1281falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse275false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.16170.1617falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse276false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse001994-11-02falsefalsetruefalsefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalse277false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse15falsefalseUSDtruefalse{dei_LegalEntityAxis} : Global Hard Assets Fund {rr_ProspectusShareClassAxis} : Class I (Global Hard Assets Fund) 4/14/2011 - 4/14/2011 USD ($) $c12_S000009200Member_C000033047Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000033047Memberrr_ProspectusShareClassAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse278true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse279false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse280false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse281false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00980.0098falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse282false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse283false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00060.0006falsefalsefalsefalsefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse284false0rr_AcquiredFundFeesAndExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00010.0001falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse285false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01050.0105falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse286false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0004-0.0004[3]falsefalsefalsefalsefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse287false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01010.0101falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse288false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue103103falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse289false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue330330falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse290false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue575575falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse291false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue12791279falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse292false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue103103falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse293false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue330330falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse294false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue575575falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse295false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue12791279falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse296false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.28930.2893falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse297false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.10270.1027falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse298false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse002006-05-01falsefalsetruefalsefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalse299false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse16falsefalseUSDtruefalse{dei_LegalEntityAxis} : Global Hard Assets Fund {rr_ProspectusShareClassAxis} : Class Y (Global Hard Assets Fund) 4/14/2011 - 4/14/2011 USD ($) $c13_S000009200Member_C000088112Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088112Memberrr_ProspectusShareClassAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse300true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse301false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse302false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse303false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00980.0098falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse304false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse305false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00110.0011falsefalsefalsefalsefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse306false0rr_AcquiredFundFeesAndExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00010.0001falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse307false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01100.0110falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse308false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000[3]falsefalsefalsefalsefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse309false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01100.0110falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse310false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue112112falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse311false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue350350falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse312false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue606606falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse313false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue13401340falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse314false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue112112falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse315false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue350350falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse316false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue606606falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse317false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue13401340falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse318false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.20470.2047falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse319false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse002010-05-01falsefalsetruefalsefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalse320false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse17falsefalsetruefalse{dei_LegalEntityAxis} : Global Hard Assets Fund {rr_PerformanceMeasureAxis} : SPNorth_American_Natural_Resources_Sector_Index_reflects_no_deduction_for_fees_expenses_or_taxes 4/14/2011 - 4/14/2011 c16_S000009200Member_SPNorth_American_Natural_Resources_Sector_Index_reflects_no_deduction_for_fees_expenses_or_taxesMemberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseS&P®North American Natural Resources Sector Index (reflects no deduction for fees, expenses or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_SPNorth_American_Natural_Resources_Sector_Index_reflects_no_deduction_for_fees_expenses_or_taxesMemberrr_PerformanceMeasureAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0OthernaNo definition available.No authoritative reference available.falsefalse321true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse322false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.23880.2388falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse323false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.08980.0898falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse324false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.09940.0994falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse325false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse18falsefalsetruefalse{dei_LegalEntityAxis} : Global Hard Assets Fund {rr_PerformanceMeasureAxis} : SP500_Index_reflects_no_deduction_for_fees_expenses_or_taxes 4/14/2011 - 4/14/2011 c17_S000009200Member_SP500_Index_reflects_no_deduction_for_fees_expenses_or_taxesMemberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseS&P®500 Index (reflects no deduction for fees, expenses or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_SP500_Index_reflects_no_deduction_for_fees_expenses_or_taxesMemberrr_PerformanceMeasureAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0OthernaNo definition available.No authoritative reference available.falsefalse326true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse327false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.15060.1506falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse328false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.02290.0229falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse329false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01410.0141falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse330false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse19falsefalseUSDtruefalse{dei_LegalEntityAxis} : International Investors Gold Fund 4/14/2011 - 4/14/2011 USD ($) $c18_S000009199Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse331true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse332false0rr_RiskReturnHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00RISK/RETURNfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Investment Objectives/Goals Include the following information, in plain English under rule 421(d) under the Securities Act, in the order and subject matter indicatedReference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 falsefalse333false0rr_ObjectiveHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00INVESTMENT OBJECTIVEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse334false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The International Investors Gold Fund seeks long-term capital appreciation by investing in common stocks of gold-mining companies. The Fund may take current income into consideration when choosing investments.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse335false0rr_ExpenseHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00FUND FEES AND EXPENSESfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Fee Table Includes the following information, in plain English under rule 421(d) under the Securities Act, after Item 2 Fees and expenses of the Fund This table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Shareholder Fees (fees paid directly from your investment) Example 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 you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be You would pay the following expenses if you did not redeem your shares The Example does not reflect sales charges (loads) on reinvested dividends [and other distributions]. If these sales charges (loads) were included, your costs would be higher. Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. 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 __% of the average value of its whole portfolio. Instructions. A.3.instructions.6 New Funds. For purposes of this Item, a "New Fund" is a Fund that does not include in Form N-1A financial statements reporting operating results or that includes financial statements for the Fund's initial fiscal year reporting operating results for a period of 6 months or less. The following Instructions apply to New Funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph d -Subsection instructions falsefalse336false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds. More information about these and other discounts is available from your financial professional and in the &#8220;Shareholder Information&#8221; section of the Fund&#8217;s prospectus and in the &#8220;Availability of Discounts&#8221; and &#8220;Breakpoint Linkage Rules for Discounts&#8221; sections of the Fund&#8217;s SAI.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse337false0rr_ShareholderFeesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Shareholder Fees (fees paid directly from your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subsection table falsefalse338false0rr_OperatingExpensesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 7 -Subsection table falsefalse339false0rr_PortfolioTurnoverHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PORTFOLIO TURNOVERfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 5 -Subsection instructions falsefalse340false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 33% of the average value of its portfolio.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalse341false0rr_PortfolioTurnoverRaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.330.33falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureThis element represents the rate of portfolio turnover presented as a percentage (SEC Form N-1A 2006-09-14 A.3.example.3 Portfolio Turnover A.3.instructions.5 Portfolio Turnover).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalse342false0rr_ExpenseBreakpointDiscountsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds. More information about these and other discounts is available from your financial professional and in the "Shareholder Information" section of the Fund's prospectus and in the "Availability of Discounts" and "Breakpoint Linkage Rules for Discounts" sections of the Fund's SAI.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInclude the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse343false0rr_ExpenseBreakpointMinimumInvestmentRequiredAmountrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2500025000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents the minimum level of investment required to qualify for discounted sales charges or fund expenses (SEC Form N-1A 2006-09-14 A.3.instructions.1.b).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse344false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Expense ExamplefalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse345false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following 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 either redeem all of your shares at the end of these periods or continue to hold them. The example also assumes that your investment has a 5% return each year and that the Fund&#8217;s operating expenses remain the same. Although your actual expenses may be higher or lower, based on these assumptions, your costs would be:</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThe Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection example falsefalse346false0rr_ExpenseExampleByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00SoldfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse347false0rr_ExpenseExampleNoRedemptionByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00HeldfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse348false0rr_StrategyHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL INVESTMENT STRATEGIESfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse349false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Under normal conditions, the Fund invests at least 80% of its net assets in securities of companies principally engaged in gold-related activities, instruments that derive their value from gold, gold coins and bullion. A company principally engaged in gold-related activities is one that derives at least 50% of its revenues from gold-related activities, including the exploration, mining or processing of or dealing in gold. The Fund concentrates its investments in the gold-mining industry and therefore invests 25% or more of its total assets in such industry. The Fund is considered to be &#8220;non-diversified&#8221; which means that it may invest in fewer securities than a &#8220;diversified&#8221; fund.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund invests in securities of companies with economic ties to countries throughout the world, including the U.S. Under ordinary circumstances, the Fund will invest in securities of issuers from a number of different countries. The Fund may invest in securities of companies of any capitalization range. The Fund primarily invests in companies that the portfolio manager believes represent value opportunities and/or that have growth potential within their market niche, through their ability to increase production capacity at reasonable cost or make gold discoveries around the world. The portfolio manager utilizes both a macro-economic examination of gold market themes and a fundamental analysis of prospective companies in the search for value and growth opportunities.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may invest up to 12.5% of its net assets, as of the date of the investment, in gold and silver coins, as well as gold, silver, platinum and palladium bullion. The Fund&#8217;s investments in coins and bullion will not earn income, and the sole source of return to the Fund from these investments will be from gains or losses realized on the sale of such investments.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may use derivative instruments, such as structured notes, futures, options and swap agreements, to gain or hedge exposure. The Fund may invest up to 20% of its net assets in securities issued by other investment companies, including exchange-traded funds (&#8220;ETFs&#8221;). The Fund may also invest in money market funds, but these investments are not subject to this limitation. The Fund may invest in ETFs to participate in, or gain rapid exposure to, certain market sectors, or when direct investments in certain countries are not permitted.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse350false0rr_RiskHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL RISKSfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subsection b falsefalse351false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">There is no assurance that the Fund will achieve its investment objective. The Fund&#8217;s share price and return will fluctuate with changes in the market value of the Fund&#8217;s portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Commodities and Commodity-Linked Derivatives.</b> Exposure to the commodities markets, such as precious metals, industrial metals, gas and other energy products and natural resources, may subject a Fund to greater volatility than investments in traditional securities. The commodities markets may fluctuate widely based on a variety of factors including changes in overall market movements, political and economic events and policies, war, acts of terrorism and changes in interest rates or inflation rates. Because the value of a commodity-linked derivative instrument and structured note typically are based upon the price movements of physical commodities, the value of these securities will rise or fall in response to changes in the underlying commodities or related index of investment.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Concentration in Gold-Mining Industry.</b> The Fund may be subject to greater risks and market fluctuations than a fund whose portfolio has exposure to a broader range of industries. The Fund may be susceptible to financial, economic, political or market events, as well as government regulation, impacting the gold industry. Fluctuations in the price of gold often dramatically affect the profitability of companies in the gold industry.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Derivatives.</b> The use of derivatives, such as swap agreements, options, warrants, futures contracts, currency forwards and structured notes, presents risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. The use of derivatives can lead to losses because of adverse movements in the price or value of the underlying security, asset, index or reference rate. Derivative strategies often involve leverage, which may exaggerate a loss, potentially causing a Fund to lose more money than it would have lost had it invested in the underlying security. Also, a liquid secondary market may not always exist for the Fund&#8217;s derivative positions at times when the Fund might wish to terminate or sell such positions and over the counter instruments may be illiquid.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Direct Investments.</b> Direct investments may involve a high degree of business and financial risk that can result in substantial losses. Because of the absence of any public trading market for these investments, a Fund may take longer to liquidate these positions than would be the case for publicly traded securities. Direct investments are generally considered illiquid and will be aggregated with other illiquid investments for purposes of the limitation on illiquid investments.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Emerging Markets Securities.</b> Emerging markets securities typically present even greater exposure to the risks described under &#8220;Foreign Securities&#8221; and may be particularly sensitive to certain economic changes. Emerging markets securities are exposed to a number of risks that may make these investments volatile in price or difficult to trade.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Foreign Currency Transactions.</b> An investment transacted in a foreign currency may lose value due to fluctuations in the rate of exchange. These fluctuations can make the return on an investment go up or down, entirely apart from the quality or performance of the investment itself.</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Foreign Securities.</b> Foreign investments are subject to greater risks than U.S. domestic investments. These additional risks may include exchange rate fluctuations and exchange controls; less publicly available information; more volatile or less liquid securities markets; and the possibility of arbitrary action by foreign governments, or political, economic or social instability. Foreign companies also may be subject to significantly higher levels of taxation than U.S. companies, including potentially confiscatory levels of taxation, thereby reducing the earnings potential of such foreign companies.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Investments in Other Investment Companies.</b> A Fund&#8217;s investment in another investment company may subject the Fund indirectly to the underlying risks of the investment company. The Fund also will bear its share of the underlying investment company&#8217;s fees and expenses, which are in addition to the Fund&#8217;s own fees and expenses.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Market.</b> Market risk refers to the risk that the market prices of securities that a Fund holds will rise or fall, sometimes rapidly or unpredictably. In general, equity securities tend to have greater price volatility than debt securities.</font></p> <p style="margin:3.5mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Non-Diversification.</b> A non-diversified fund&#8217;s greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund&#8217;s portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio.</font></p> <p style="margin:3.5mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Small- and Medium-Capitalization Companies.</b> Securities of small- and medium-sized companies often have greater price volatility, lower trading volume and less liquidity than larger more established companies. The stocks of small- and medium-sized companies may have returns that vary, sometimes significantly, from the overall stock market.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringNarrative Risk Disclosure. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Clause instruction -Subsection b falsefalse352false0rr_RiskLoseMoneyrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00The Fund's share price and return will fluctuate with changes in the market value of the Fund's portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringSummarize the principal risks of investing in the Fund, including the risks to which the Fund's portfolio as a whole is subject and the circumstances reasonably likely to affect adversely the Fund's net asset value, yield, and total return. Unless the Fund is a Money Market Fund, disclose that loss of money is a risk of investing in the Fund. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Subsection b falsefalse353false0rr_RiskNondiversifiedStatusrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Non-Diversification. A non-diversified fund's greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund's portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIf applicable, state that the Fund is non-diversified, describe the effect of non-diversification (e.g., disclose that, compared with other funds, the Fund may invest a greater percentage of its assets in a particular issuer), and summarize the risks of investing in a non-diversified fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph iv -Subsection b falsefalse354false0rr_BarChartAndPerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PERFORMANCEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse355false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund&#8217;s performance from year to year and by showing how the Fund&#8217;s average annual total returns compare with those of a broad measure of market performance and one or more other performance measures. For instance, the NYSE Arca Gold Miners (GDM) Index is a modified market capitalization-weighted index comprised of publicly traded companies involved primarily in the mining for gold. The GDM Index has only been calculated in real time by an independent calculation agent since October 7, 2004. The Fund&#8217;s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. The annual returns in the bar chart are for the Fund&#8217;s Class&#160;A shares and do not reflect sales loads. If sales loads were reflected, returns would be less than those shown.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Additionally, large purchases and/or redemptions of shares of a class, relative to the amount of assets represented by the class, may cause the annual returns for each class to differ. During the 12-month period ended December 31, 2008, the performance of the Class I shares of the Fund was materially affected by significant redemptions of Class I shares during that period. Updated performance information for the Fund is available on the Van Eck website at vaneck.com.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse356false0rr_PerformanceInformationIllustratesVariabilityOfReturnsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00The following chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance and one or more other performance measures.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInclude the bar chart and table required by paragraphs (b)(2)(ii) and (iii) of this section. Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph i -Subsection b falsefalse357false0rr_PerformanceAvailabilityWebSiteAddressrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00vaneck.comfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIf applicable, include a statement explaining that updated performance information is available and providing a Website address and/or toll-free (or collect) telephone number where the updated information may be obtained.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph i -Subsection b falsefalse358false0rr_PerformancePastDoesNotIndicateFuturerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInclude the bar chart and table required by paragraphs (b)(2)(ii) and (iii) of this section. Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph i -Subsection b falsefalse359false0rr_BarChartHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00CLASS A: Annual Total Returns (%) as of 12/31falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse360false0rr_BarChartNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p align="center"><font style="font-family:sans-serif; font-size:3.5mm;"></font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringProvide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph i -Subsection b falsefalse361false0rr_BarChartClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<table cellspacing="0" style="margin-left:0.00%;margin-right:0.00%;width:100.00%;"> <tr valign="top"> <td style="width:13.69%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:8.73%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:77.58%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> </tr> <tr valign="top"> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Best Quarter:</b></font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">+44.96%</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">1Q &#8217;02</font></p> </td> </tr> <tr valign="top"> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Worst Quarter:</b></font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">-31.82%</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">3Q &#8217;08</font></p> </td> </tr> </table>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse362false0rr_HighestQuarterlyReturnLabelrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Best QuarterfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse363false0rr_BarChartHighestQuarterlyReturnDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002002-03-31falsefalsetruefalsefalseOtherxbrli:dateItemTypedateIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. 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If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse365false0rr_LowestQuarterlyReturnLabelrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Worst QuarterfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. 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If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse367false0rr_BarChartLowestQuarterlyReturnrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.3182-0.3182falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse368false0rr_PerformanceTableUsesHighestFederalRaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00After 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.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringProvide a brief explanation that 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.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Subsection b falsefalse369false0rr_PerformanceTableNotRelevantToTaxDeferredrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-deferred account, such as a 401(k) plan or Investment Retirement Account.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringProvide a brief explanation that the actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iv -Clause B -Subsection b falsefalse370false0rr_PerformanceTableOneClassOfAfterTaxShownrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00These returns are shown for one class of shares only; after tax-returns for the other classes may vary.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringProvide a brief explanation that if the Fund is a Multiple Class Fund that offers more than one Class in the prospectus, after-tax returns are shown for only one Class and after-tax returns for other Classes will vary.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Subsection b Reference 2: 2 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iv -Clause C -Subsection b falsefalse371false0rr_AverageAnnualReturnCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Average Annual Total Returns as of 12/31/10falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 5 -Subsection b falsefalse372false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse20falsefalseUSDtruefalse{dei_LegalEntityAxis} : International Investors Gold Fund {rr_ProspectusShareClassAxis} : Class A (International Investors Gold Fund) 4/14/2011 - 4/14/2011 USD ($) $c19_S000009199Member_C000024994Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024994Memberrr_ProspectusShareClassAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170ratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse373true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse374false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse375false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse376false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00630.0063falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse377false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse378false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00360.0036falsefalsefalsefalsefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse379false0rr_AcquiredFundFeesAndExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00010.0001falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse380false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01250.0125falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse381false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue695695falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse382false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue949949falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse383false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue12221222falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse384false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue19991999falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse385false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue695695falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse386false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue949949falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse387false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue12221222falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse388false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue19991999falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse389false0rr_AnnualReturn2001rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.20740.2074falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse390false0rr_AnnualReturn2002rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.90480.9048falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse391false0rr_AnnualReturn2003rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.44250.4425falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse392false0rr_AnnualReturn2004rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.0773-0.0773falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse393false0rr_AnnualReturn2005rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.35620.3562falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse394false0rr_AnnualReturn2006rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.45230.4523falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse395false0rr_AnnualReturn2007rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.27410.2741falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse396false0rr_AnnualReturn2008rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.2903-0.2903falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse397false0rr_AnnualReturn2009rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.63750.6375falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse398false0rr_AnnualReturn2010rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.50990.5099falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse399false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.42340.4234falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse400false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.25080.2508falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse401false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.28950.2895falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse402false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse001956-02-10falsefalsetruefalsefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalse403false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse21falsefalsetruefalse{dei_LegalEntityAxis} : International Investors Gold Fund {rr_ProspectusShareClassAxis} : Class A (International Investors Gold Fund) {rr_PerformanceMeasureAxis} : After Taxes on Distributions 4/14/2011 - 4/14/2011 c23_S000009199Member_AfterTaxesOnDistributionsMember_C000024994Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024994Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseAfter Taxes on Distributionsrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsMemberrr_PerformanceMeasureAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0OthernaNo definition available.No authoritative reference available.falsefalse404true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse405false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.37130.3713[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse406false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.22070.2207[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse407false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.26260.2626[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse408false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00&nbsp;[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse409false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse22falsefalsetruefalse{dei_LegalEntityAxis} : International Investors Gold Fund {rr_ProspectusShareClassAxis} : Class A (International Investors Gold Fund) {rr_PerformanceMeasureAxis} : After Taxes on Distributions and Sales 4/14/2011 - 4/14/2011 c24_S000009199Member_AfterTaxesOnDistributionsAndSalesMember_C000024994Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024994Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseAfter Taxes on Distributions and Salesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsAndSalesMemberrr_PerformanceMeasureAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0OthernaNo definition available.No authoritative reference available.falsefalse410true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse411false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.28940.2894[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse412false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.20560.2056[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse413false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.25070.2507[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse414false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00&nbsp;[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse415false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse23falsefalseUSDtruefalse{dei_LegalEntityAxis} : International Investors Gold Fund {rr_ProspectusShareClassAxis} : Class C (International Investors Gold Fund) 4/14/2011 - 4/14/2011 USD ($) $c20_S000009199Member_C000024995Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024995Memberrr_ProspectusShareClassAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170ratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse416true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse417false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse418false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01000.0100falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse419false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00630.0063falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse420false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01000.0100falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse421false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00310.0031falsefalsefalsefalsefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse422false0rr_AcquiredFundFeesAndExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00010.0001falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse423false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01950.0195falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse424false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue298298falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse425false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue612612falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse426false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue10521052falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse427false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue22752275falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse428false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue198198falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse429false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue612612falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse430false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue10521052falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse431false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue22752275falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse432false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.48890.4889falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse433false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.25650.2565falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse434false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.24350.2435falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse435false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse002003-10-03falsefalsetruefalsefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalse436false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse24falsefalseUSDtruefalse{dei_LegalEntityAxis} : International Investors Gold Fund {rr_ProspectusShareClassAxis} : Class I (International Investors Gold Fund) 4/14/2011 - 4/14/2011 USD ($) $c21_S000009199Member_C000033046Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000033046Memberrr_ProspectusShareClassAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170ratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse437true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse438false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse439false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse440false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00630.0063falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse441false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse442false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00370.0037falsefalsefalsefalsefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse443false0rr_AcquiredFundFeesAndExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00010.0001falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse444false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01010.0101falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse445false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue103103falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse446false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue322322falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse447false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue558558falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse448false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue12361236falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse449false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue103103falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse450false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue322322falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse451false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue558558falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse452false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue12361236falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse453false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.51470.5147falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse454false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.29980.2998falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse455false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse002006-10-02falsefalsetruefalsefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalse456false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse25falsefalseUSDtruefalse{dei_LegalEntityAxis} : International Investors Gold Fund {rr_ProspectusShareClassAxis} : Class Y (International Investors Gold Fund) 4/14/2011 - 4/14/2011 USD ($) $c22_S000009199Member_C000088111Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088111Memberrr_ProspectusShareClassAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse457true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse458false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse459false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse460false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00630.0063falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse461false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse462false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00470.0047falsefalsefalsefalsefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse463false0rr_AcquiredFundFeesAndExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00010.0001falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse464false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01110.0111falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse465false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue113113falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse466false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue353353falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse467false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue612612falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse468false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue13521352falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse469false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue113113falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse470false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue353353falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse471false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue612612falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse472false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue13521352falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse473false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.32590.3259falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse474false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse002010-05-01falsefalsetruefalsefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalse475false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse26falsefalsetruefalse{dei_LegalEntityAxis} : International Investors Gold Fund {rr_PerformanceMeasureAxis} : NYSE_Arca_Gold_Miners_Index 4/14/2011 - 4/14/2011 c25_S000009199Member_NYSE_Arca_Gold_Miners_IndexMemberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseNYSE Arca Gold Miners Index (reflects no deduction for fees, expenses or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_NYSE_Arca_Gold_Miners_IndexMemberrr_PerformanceMeasureAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0OthernaNo definition available.No authoritative reference available.falsefalse476true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse477false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.34750.3475falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse478false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.14650.1465falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse479false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse27falsefalsetruefalse{dei_LegalEntityAxis} : International Investors Gold Fund {rr_PerformanceMeasureAxis} : SP_500_Index 4/14/2011 - 4/14/2011 c26_S000009199Member_SP_500_IndexMemberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseS&P® 500 Index (reflects no deduction for fees, expenses or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_SP_500_IndexMemberrr_PerformanceMeasureAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0OthernaNo definition available.No authoritative reference available.falsefalse480true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse481false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.15060.1506falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse482false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.02290.0229falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse483false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01410.0141falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse484false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse28falsefalseUSDtruefalse{dei_LegalEntityAxis} : Multi-Manager Alternatives Fund 4/14/2011 - 4/14/2011 USD ($) $c27_S000024722Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse485true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse486false0rr_RiskReturnHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00RISK/RETURNfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Investment Objectives/Goals Include the following information, in plain English under rule 421(d) under the Securities Act, in the order and subject matter indicatedReference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 falsefalse487false0rr_ObjectiveHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00INVESTMENT OBJECTIVEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse488false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Multi-Manager Alternatives Fund seeks to achieve consistent absolute (positive) returns in various market cycles.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse489false0rr_ExpenseHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00FUND FEES AND EXPENSESfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Fee Table Includes the following information, in plain English under rule 421(d) under the Securities Act, after Item 2 Fees and expenses of the Fund This table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Shareholder Fees (fees paid directly from your investment) Example 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 you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be You would pay the following expenses if you did not redeem your shares The Example does not reflect sales charges (loads) on reinvested dividends [and other distributions]. If these sales charges (loads) were included, your costs would be higher. Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. 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 __% of the average value of its whole portfolio. Instructions. A.3.instructions.6 New Funds. For purposes of this Item, a "New Fund" is a Fund that does not include in Form N-1A financial statements reporting operating results or that includes financial statements for the Fund's initial fiscal year reporting operating results for a period of 6 months or less. The following Instructions apply to New Funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph d -Subsection instructions falsefalse490false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the <b></b>Van Eck Funds. More information about these and other discounts is available from your financial professional and in the &#8220;Shareholder Information&#8221; section of the Fund&#8217;s prospectus and in the &#8220;Availability of Discounts&#8221; and &#8220;Breakpoint Linkage Rules for Discounts&#8221; sections of the Fund&#8217;s Statement of Additional Information (&#8220;SAI&#8221;).</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse491false0rr_ShareholderFeesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Shareholder Fees (fees paid directly from your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subsection table falsefalse492false0rr_OperatingExpensesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 7 -Subsection table falsefalse493false0rr_FeeWaiverOrReimbursementOverAssetsDateOfTerminationrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002012-05-01falsefalsefalsefalsefalseOtherus-types:dateStringItemTypenormalizedstringThis element represents the date of expected termination of any expense reimbursement or fee waiver arrangements that reduce any Fund operating expenses (SEC Form N-1A 2006-09-14 A.3.table.1.11 Total Annual Fund Operating Expenses A.3.instructions.3.e).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph e -Subsection instructions falsefalse494false0rr_PortfolioTurnoverHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PORTFOLIO TURNOVERfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 5 -Subsection instructions falsefalse495false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 275% of the average value of its portfolio.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalse496false0rr_PortfolioTurnoverRaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse2.752.75falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureThis element represents the rate of portfolio turnover presented as a percentage (SEC Form N-1A 2006-09-14 A.3.example.3 Portfolio Turnover A.3.instructions.5 Portfolio Turnover).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalse497false0rr_ExpenseBreakpointDiscountsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds. More information about these and other discounts is available from your financial professional and in the "Shareholder Information" section of the Fund's prospectus and in the "Availability of Discounts" and "Breakpoint Linkage Rules for Discounts" sections of the Fund's Statement of Additional Information ("SAI").falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInclude the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse498false0rr_ExpenseBreakpointMinimumInvestmentRequiredAmountrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2500025000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents the minimum level of investment required to qualify for discounted sales charges or fund expenses (SEC Form N-1A 2006-09-14 A.3.instructions.1.b).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse499false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Expense ExamplefalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse500false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following 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 either redeem all of your shares at the end of these periods or continue to hold them. The example also assumes that your investment has a 5% return each year and that the Fund&#8217;s operating expenses remain the same. Although your actual expenses may be higher or lower, based on these assumptions, your costs would be:</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThe Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection example falsefalse501false0rr_ExpenseExampleByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Sold falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse502false0rr_ExpenseExampleNoRedemptionByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00HeldfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYou would pay the following expenses if you did not redeem your shares. 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Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse504false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund pursues its objective by allocating its assets among (i) investment sub-advisers (the &#8220;Sub-Advisers&#8221;, also referred to as &#8220;managers&#8221;) with experience in managing alternative or non-traditional investment strategies, and (ii) affiliated and unaffiliated funds, including open end and closed end funds and exchange-traded funds (&#8220;ETFs&#8221;), which employ a variety of investment strategies (collectively, the &#8220;Underlying Funds&#8221;). The Fund is considered to be &#8220;non-diversified&#8221; which means that it may invest in fewer securities than a &#8220;diversified&#8221; fund.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The main strategies that may be employed by the Sub-Advisers and the Underlying Funds include:</font></p> <p style="margin:3.5mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm; color:#003aa8;"><i>DIRECTIONAL AND TACTICAL STRATEGIES</i></font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Directional and tactical strategies seek to exploit broad market trends in equities, interest rates or commodity prices. These strategies may include:</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Long/Short Equity:</b> A long/short strategy seeks to invest in securities believed to be undervalued or offer high growth opportunities while also attempting to reduce overall market risk or take advantage of an anticipated decline in the price of an overvalued company or index by using short sales or options on common stocks or indexes to hedge risk. This strategy may also use derivatives, including options, financial futures and options on futures. Long and short positions may not be invested in equal dollars and, as such, may not seek to neutralize general market risks.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Long-Only:</b> A long-only strategy seeks to invest in stocks that are believed to have appreciation potential. This strategy may concentrate in certain markets, industries or geographical areas. This strategy is primarily managed for absolute return and to assess risk and opportunity on an absolute, not an index-relative basis.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Short-Only:</b> A short-only strategy seeks to identify securities that are expected to depreciate in value. In a short sale, the Fund borrows an equity security from a broker, and then sells it. If the value of the security goes down, the Fund can buy it back in the market and return it to the broker, making a profit. This strategy may be employed to hedge or offset long-only equity strategies of similar size in assets and volatility.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Long/Short Credit &amp; Fixed Income:</b> A long/short credit strategy combines long and short positions in debt securities of domestic and foreign governments, agencies, and companies of all maturities and qualities, including high yield (junk bonds) and Treasury Inflation-Protected Securities (&#8220;TIPS&#8221;), ETFs and emerging market debt. This strategy may invest in mortgage-backed securities, collateralized mortgage obligations, asset-backed securities and other mortgage related securities. The strategy may focus on short positions by utilizing instruments to anticipate the decline in the price of an overvalued security or type of security. Such hedging instruments could include individual bonds or related stocks, futures contracts or other instruments.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Global Macro and Emerging Markets:</b> A global macro and emerging markets strategy seek to profit from directional changes in currencies, stock markets, commodity prices and market volatility. This strategy may utilize positions held through individual securities, ETFs, derivative contracts, swaps or other financial instruments linked to major market, sector or country indices, fixed income securities, currencies and commodities. This strategy may invest in a limited number of securities, issuers, industries or countries which may result in higher volatility.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Managed Futures:</b> A managed futures strategy seeks to preserve capital through capturing opportunities in various futures markets. This strategy typically includes long positions in the futures that are showing strong upward momentum and short positions in the futures that are in a downward trend. This strategy may provide different exposures to many markets and thus offer low correlations with traditional stock and bond markets.</font></p> <p style="margin:3.5mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm; color:#003aa8;"><i>EVENT-DRIVEN STRATEGIES</i></font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Event-driven strategies seek to benefit from price movements caused by anticipated corporate events, such as mergers, acquisitions, spin-offs or other special situations. These strategies may include:</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Distressed Securities:</b> Investing in the securities of issuers in financial distress based upon the expectations of the manager as to whether a turnaround may materialize.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Special Situations:</b> Investing in the securities of issuers based upon the expectations of the manager as to whether the price of such securities may change in the short term due to a special situation, such as a stock buy-back, spin-off, bond upgrade or a positive earnings report.</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Merger Arbitrage:</b> Seeking to exploit price differentials in the shares of companies that are involved in announced corporate events, such as mergers, by assessing the likelihood that such events will be consummated as proposed.</font></p> <p style="margin:3.5mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm; color:#003aa8;"><i>ARBITRAGE STRATEGIES</i></font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Arbitrage strategies seek to exploit price differences in identical, related or similar securities on different markets or in different forms so as to minimize overall market risk. These strategies may include:</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Fixed Income or Interest Rate Arbitrage:</b> Buying and shorting different debt securities and/or futures contracts, including interest rate swap arbitrage, U.S. and non-U.S. bond arbitrage.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Convertible Arbitrage:</b> Seeking to exploit price differentials in the convertible bond markets by buying the convertible bond, and shorting the common stock, of the same company.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Pairs Trading:</b> Certain securities, often competitors in the same sector, are sometimes correlated in their day-to-day price movements. If the performance link breaks down, <i>i.e.</i>, one stock trades up while the other traded down, a manager may sell the outperforming stock and buy the underperforming one, based on the assumption that the &#8220;spread&#8221; between the two would eventually converge. This may help to hedge against market and sector risk.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Equity Market Neutral:</b> A market neutral strategy combines long and short equity positions to seek to keep its exposure to overall market risk very low. Such strategies take long positions in those securities believed to have attractive appreciation potential and short positions in those securities believed to have depreciation potential. This strategy is typically constructed to attempt to be beta-neutral and attempts to control one or more industry, sector, market capitalization or other potential market bias exposure.</font></p> <p style="margin:3.5mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm; color:#003aa8;"><i>ALLOCATION OF FUND ASSETS</i></font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Adviser determines the allocation of the Fund&#8217;s assets among the various Sub-Advisers and Underlying Funds. In selecting and weighting investment options, the Adviser seeks to identify Sub-Advisers and Underlying Funds which, based on their investment styles and historical performance, have the potential, in the opinion of the Adviser, to perform independently of each other and achieve positive risk-adjusted returns in various market cycles. This is referred to as &#8220;low correlation.&#8221; The degree of correlation of any given investment strategy of a Sub-Adviser or an Underlying Fund will, with other investment strategies and the market as a whole, vary as a result of market conditions and other factors, and some Sub-Advisers and Underlying Funds will have a greater degree of correlation with each other and with the market than others.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">By allocating its assets among a number of investment options, the Fund seeks to achieve diversification, less risk and lower volatility than if the Fund utilized a single manager or a single strategy approach. The Fund is not required to invest with any minimum number of Sub-Advisers or Underlying Funds, and does not have minimum or maximum limitations with respect to allocations of assets to any Sub-Adviser, investment strategy or market sector. The Adviser may change the allocation of the Fund&#8217;s assets among the available investment options, and may add or remove Sub-Advisers, at any time. For a variety of reasons, including capacity and regulatory limitations, not all the Sub-Advisers may be available to the Fund if it chooses to use them in the future.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Each Sub-Adviser is responsible for the day-to-day management of its allocated portion of Fund assets. 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Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). 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Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph i -Subsection b falsefalse516false0rr_BarChartClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<table cellspacing="0" style="margin-left:0.00%;margin-right:0.00%;width:100.00%;"> <tr valign="top"> <td style="width:11.90%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:13.69%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:7.14%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:16.67%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:13.69%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:7.14%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:20.24%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> </tr> <tr valign="top"> <td> <p><font style="font-size:0.2mm">&#160;</font></p> </td> <td width="3">&#160;</td> <td> <p style="margin:0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Best Quarter:</b></font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">+2.55%</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">3Q &#8217;10</font></p> </td> <td width="3">&#160;</td> <td> <p style="margin:0;"><font style="font-size:0.2mm">&#160;</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-size:0.2mm">&#160;</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-size:0.2mm">&#160;</font></p> </td> </tr> <tr valign="top"> <td> <p><font style="font-size:0.2mm">&#160;</font></p> </td> <td width="3">&#160;</td> <td> <p style="margin:0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Worst Quarter:</b></font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">-0.66%</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">2Q &#8217;10</font></p> </td> <td width="3">&#160;</td> <td> <p style="margin:0;"><font style="font-size:0.2mm">&#160;</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-size:0.2mm">&#160;</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-size:0.2mm">&#160;</font></p> </td> </tr> </table>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse517false0rr_HighestQuarterlyReturnLabelrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Best QuarterfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse518false0rr_BarChartHighestQuarterlyReturnDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002010-09-30falsefalsetruefalsefalseOtherxbrli:dateItemTypedateIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse519false0rr_BarChartHighestQuarterlyReturnrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.02550.0255falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse520false0rr_LowestQuarterlyReturnLabelrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Worst QuarterfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse521false0rr_BarChartLowestQuarterlyReturnDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002010-06-30falsefalsetruefalsefalseOtherxbrli:dateItemTypedateIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse522false0rr_BarChartLowestQuarterlyReturnrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.0066-0.0066falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse523false0rr_PerformanceTableUsesHighestFederalRaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00After 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.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringProvide a brief explanation that 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.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Subsection b falsefalse524false0rr_PerformanceTableNotRelevantToTaxDeferredrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-deferred account, such as a 401(k) plan or Investment Retirement Account.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringProvide a brief explanation that the actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iv -Clause B -Subsection b falsefalse525false0rr_PerformanceTableOneClassOfAfterTaxShownrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00These returns are shown for one class of shares only; after tax-returns for the other classes may vary.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringProvide a brief explanation that if the Fund is a Multiple Class Fund that offers more than one Class in the prospectus, after-tax returns are shown for only one Class and after-tax returns for other Classes will vary.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Subsection b Reference 2: 2 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iv -Clause C -Subsection b falsefalse526false0rr_AverageAnnualReturnCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Average Annual Total Returns as of 12/31/10falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 5 -Subsection b falsefalse527false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse29falsefalseUSDtruefalse{dei_LegalEntityAxis} : Multi-Manager Alternatives Fund {rr_ProspectusShareClassAxis} : Class A (Multi-Manager Alternatives Fund) 4/14/2011 - 4/14/2011 USD ($) $c28_S000024722Member_C000073442Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000073442Memberrr_ProspectusShareClassAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse528true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse529false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse530false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse531false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01320.0132falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse532false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse533false0rr_Component1OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00270.0027falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureThe Fund may subdivide this caption into no more than three subcaptions that identify the largest expense or expenses comprising "Other Expenses," but must include a total of all "Other Expenses." Alternatively, the Fund may include the components of "Other Expenses" in a parenthetical to the caption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause iii -Subsection instructions falsefalse534false0rr_Component2OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00750.0075falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureThe Fund may subdivide this caption into no more than three subcaptions that identify the largest expense or expenses comprising "Other Expenses," but must include a total of all "Other Expenses." Alternatively, the Fund may include the components of "Other Expenses" in a parenthetical to the caption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 10 -Subsection table falsefalse535false0rr_AcquiredFundFeesAndExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00780.0078falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse536false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.03370.0337falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse537false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000[4]falsefalsefalsefalsefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse538false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.03370.0337falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse539false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue340340falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse540false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue10361036falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse541false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue17551755falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse542false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue36583658falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse543false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue340340falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse544false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue10361036falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse545false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue17551755falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse546false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue36583658falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse547false0rr_AnnualReturn2010rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.04560.0456falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse548false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0146-0.0146falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse549false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0006-0.0006falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse550false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse002009-06-05falsefalsetruefalsefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalse551false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse30falsefalsetruefalse{dei_LegalEntityAxis} : Multi-Manager Alternatives Fund {rr_ProspectusShareClassAxis} : Class A (Multi-Manager Alternatives Fund) {rr_PerformanceMeasureAxis} : After Taxes on Distributions 4/14/2011 - 4/14/2011 c31_S000024722Member_AfterTaxesOnDistributionsMember_C000073442Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000073442Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseAfter Taxes on Distributionsrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsMemberrr_PerformanceMeasureAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0OthernaNo definition available.No authoritative reference available.falsefalse552true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse553false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0190-0.0190[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse554false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0035-0.0035[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse555false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse31falsefalsetruefalse{dei_LegalEntityAxis} : Multi-Manager Alternatives Fund {rr_ProspectusShareClassAxis} : Class A (Multi-Manager Alternatives Fund) {rr_PerformanceMeasureAxis} : After Taxes on Distributions and Sales 4/14/2011 - 4/14/2011 c32_S000024722Member_AfterTaxesOnDistributionsAndSalesMember_C000073442Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000073442Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseAfter Taxes on Distributions and Salesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsAndSalesMemberrr_PerformanceMeasureAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0OthernaNo definition available.No authoritative reference available.falsefalse556true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse557false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0094-0.0094[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse558false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0021-0.0021[2]falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse559false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse32falsefalseUSDtruefalse{dei_LegalEntityAxis} : Multi-Manager Alternatives Fund {rr_ProspectusShareClassAxis} : Class I (Multi-Manager Alternatives Fund) 4/14/2011 - 4/14/2011 USD ($) $c29_S000024722Member_C000073444Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000073444Memberrr_ProspectusShareClassAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse560true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse561false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse562false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse563false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01320.0132falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse564false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse565false0rr_Component1OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00270.0027falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureThe Fund may subdivide this caption into no more than three subcaptions that identify the largest expense or expenses comprising "Other Expenses," but must include a total of all "Other Expenses." Alternatively, the Fund may include the components of "Other Expenses" in a parenthetical to the caption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause iii -Subsection instructions falsefalse566false0rr_Component2OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00760.0076falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureThe Fund may subdivide this caption into no more than three subcaptions that identify the largest expense or expenses comprising "Other Expenses," but must include a total of all "Other Expenses." Alternatively, the Fund may include the components of "Other Expenses" in a parenthetical to the caption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 10 -Subsection table falsefalse567false0rr_AcquiredFundFeesAndExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00780.0078falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse568false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.03130.0313falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse569false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0013-0.0013[4]falsefalsefalsefalsefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse570false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.03000.0300falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse571false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue303303falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse572false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue954954falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse573false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue16291629falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse574false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue34303430falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse575false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue303303falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse576false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue954954falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse577false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue16291629falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse578false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue34303430falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse579false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.04890.0489falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse580false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.04040.0404falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse581false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse002009-06-05falsefalsetruefalsefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalse582false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse33falsefalseUSDtruefalse{dei_LegalEntityAxis} : Multi-Manager Alternatives Fund {rr_ProspectusShareClassAxis} : Class Y (Multi-Manager Alternatives Fund) 4/14/2011 - 4/14/2011 USD ($) $c30_S000024722Member_C000088113Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088113Memberrr_ProspectusShareClassAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170ratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse583true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse584false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse585false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse586false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01320.0132falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse587false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse588false0rr_Component1OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00300.0030falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureThe Fund may subdivide this caption into no more than three subcaptions that identify the largest expense or expenses comprising "Other Expenses," but must include a total of all "Other Expenses." Alternatively, the Fund may include the components of "Other Expenses" in a parenthetical to the caption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause iii -Subsection instructions falsefalse589false0rr_Component2OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00660.0066falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureThe Fund may subdivide this caption into no more than three subcaptions that identify the largest expense or expenses comprising "Other Expenses," but must include a total of all "Other Expenses." Alternatively, the Fund may include the components of "Other Expenses" in a parenthetical to the caption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 10 -Subsection table falsefalse590false0rr_AcquiredFundFeesAndExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00780.0078falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse591false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.03060.0306falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse592false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000[4]falsefalsefalsefalsefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse593false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.03060.0306falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse594false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue309309falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse595false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue945945falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse596false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue16061606falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse597false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue33743374falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse598false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue309309falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse599false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue945945falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse600false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue16061606falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse601false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue33743374falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse602false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.03510.0351falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse603false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse002010-05-01falsefalsetruefalsefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalse604false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse34falsefalsetruefalse{dei_LegalEntityAxis} : Multi-Manager Alternatives Fund {rr_PerformanceMeasureAxis} : HFRX_Global_Hedge_Fund_Index 4/14/2011 - 4/14/2011 c33_S000024722Member_HFRX_Global_Hedge_Fund_IndexMemberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseHFRX Global Hedge Fund Index (reflects no deduction for fees, expenses or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_HFRX_Global_Hedge_Fund_IndexMemberrr_PerformanceMeasureAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0OthernaNo definition available.No authoritative reference available.falsefalse605true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse606false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05190.0519falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse607false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse35falsefalsetruefalse{dei_LegalEntityAxis} : Multi-Manager Alternatives Fund {rr_PerformanceMeasureAxis} : SP_500_Index 4/14/2011 - 4/14/2011 c34_S000024722Member_SP_500_IndexMemberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseS&P® 500 Index (reflects no deduction for fees, expenses or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_SP_500_IndexMemberrr_PerformanceMeasureAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0OthernaNo definition available.No authoritative reference available.falsefalse608true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse609false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.15060.1506falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse610false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse36falsefalseUSDtruefalse{dei_LegalEntityAxis} : Van Eck CM Commodity Index Fund 4/14/2011 - 4/14/2011 USD ($) $c35_S000029608Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseVan Eck CM Commodity Index Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000029608Memberdei_LegalEntityAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse611true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse612false0rr_RiskReturnHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00RISK/RETURNfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Investment Objectives/Goals Include the following information, in plain English under rule 421(d) under the Securities Act, in the order and subject matter indicatedReference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 falsefalse613false0rr_ObjectiveHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00INVESTMENT OBJECTIVEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse614false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The CM Commodity Index Fund seeks to track, before fees and expenses, the performance of the UBS Bloomberg Constant Maturity Commodity Total Return Index.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse615false0rr_ExpenseHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00FUND FEES AND EXPENSESfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Fee Table Includes the following information, in plain English under rule 421(d) under the Securities Act, after Item 2 Fees and expenses of the Fund This table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Shareholder Fees (fees paid directly from your investment) Example 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 you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be You would pay the following expenses if you did not redeem your shares The Example does not reflect sales charges (loads) on reinvested dividends [and other distributions]. If these sales charges (loads) were included, your costs would be higher. Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. 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 __% of the average value of its whole portfolio. Instructions. A.3.instructions.6 New Funds. For purposes of this Item, a "New Fund" is a Fund that does not include in Form N-1A financial statements reporting operating results or that includes financial statements for the Fund's initial fiscal year reporting operating results for a period of 6 months or less. The following Instructions apply to New Funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph d -Subsection instructions falsefalse616false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds. More information about these and other discounts is available from your financial professional and in the &#8220;Shareholder Information&#8221; section of the Fund&#8217;s prospectus and in the &#8220;Availability of Discounts&#8221; and &#8220;Breakpoint Linkage Rules for Discounts&#8221; sections of the Fund&#8217;s Statement of Additional Information (&#8220;SAI&#8221;).</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse617false0rr_ShareholderFeesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Shareholder Fees (fees paid directly from your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subsection table falsefalse618false0rr_OperatingExpensesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 7 -Subsection table falsefalse619false0rr_FeeWaiverOrReimbursementOverAssetsDateOfTerminationrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002012-05-01falsefalsefalsefalsefalseOtherus-types:dateStringItemTypenormalizedstringThis element represents the date of expected termination of any expense reimbursement or fee waiver arrangements that reduce any Fund operating expenses (SEC Form N-1A 2006-09-14 A.3.table.1.11 Total Annual Fund Operating Expenses A.3.instructions.3.e).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph e -Subsection instructions falsefalse620false0rr_PortfolioTurnoverHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PORTFOLIO TURNOVERfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 5 -Subsection instructions falsefalse621false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalse622false0rr_ExpenseBreakpointDiscountsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds. More information about these and other discounts is available from your financial professional and in the "Shareholder Information" section of the Fund's prospectus and in the "Availability of Discounts" and "Breakpoint Linkage Rules for Discounts" sections of the Fund's Statement of Additional Information ("SAI").falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInclude the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse623false0rr_ExpenseBreakpointMinimumInvestmentRequiredAmountrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2500025000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents the minimum level of investment required to qualify for discounted sales charges or fund expenses (SEC Form N-1A 2006-09-14 A.3.instructions.1.b).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse624false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Expense ExamplefalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse625false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following 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 either redeem all of your shares at the end of these periods or continue to hold them. The example also assumes that your investment has a 5% return each year and that the Fund&#8217;s operating expenses remain the same. Although your actual expenses may be higher or lower, based on these assumptions, your costs would be:</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThe Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection example falsefalse626false0rr_ExpenseExampleByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00SoldfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse627false0rr_ExpenseExampleNoRedemptionByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00HeldfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse628false0rr_StrategyHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL INVESTMENT STRATEGIESfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse629false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund seeks to achieve its investment objective by investing in instruments that derive their value from the performance of the UBS Bloomberg Constant Maturity Commodity Total Return Index (the &#8220;CMCI&#8221;), as described below, and in bonds, debt securities and other fixed income instruments (&#8220;Fixed Income Instruments&#8221;) issued by various U.S. public- or private-sector entities. The Fund invests in commodity-linked derivative instruments, including commodity index-linked notes, swap agreements, commodity futures contracts and options on futures contracts that provide economic exposure to the investment returns of the commodities markets, as represented by the CMCI and its constituents. Commodities are assets that have tangible properties, such as oil, metals, and agricultural products. A commodity-linked derivative is a derivative instrument whose value is linked to the movement of a commodity, commodity index, commodity option or futures contract. The value of commodity-linked derivative instruments may be affected by overall market movements and other factors affecting the value of a particular industry or commodity, such as weather, disease, embargoes, or political and regulatory developments.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The CMCI is a rules-based, composite benchmark index diversified across 23 commodities from the following five sectors: energy, precious metals, industrial metals, agriculture and livestock. The CMCI is comprised of futures contracts with maturities ranging from around three months to over three years for each commodity, depending on liquidity. The overall return of the CMCI reflects a combination of (i)&#160;the returns on the futures contracts comprising the CMCI; and (ii)&#160;the daily fixed-income return that would be earned on a hypothetical portfolio of 91-day U.S. Treasury bills theoretically deposited as margin for the hypothetical positions in the futures contracts comprising the CMCI. The selection and relative weightings of the components of the CMCI are designed to reflect the economic significance and market liquidity of each commodity, as determined based on global economic data, consumption data, commodity futures prices, open interest and volume data. The maturity of each commodity component in the CMCI remains fixed at a predefined time interval at all times by means of a continuous rolling process, in which a weighted percentage of shorter dated contracts for each commodity are swapped for longer dated contracts on a daily basis. The CMCI is rebalanced monthly back to the target weightings of the commodity components of the CMCI and the target weightings of all commodity components are revised twice per year. A more detailed description of the CMCI is contained in Appendix A to the prospectus.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund will seek to track the returns of the CMCI by entering into swap contracts and commodity index-linked notes with one or more counterparties, which contracts and notes will rise and fall in value in response to changes in the value of the CMCI. As of the date of this prospectus, UBS was the only available counterparty with which the Fund may enter into such swap contracts on the CMCI. The Fund may enter into such contracts and notes directly or indirectly through a wholly-owned subsidiary of the Fund (the &#8220;Subsidiary&#8221;). Commodity index-linked notes are derivative debt instruments with principal and/or coupon payments linked to the performance of commodity indices (such as the CMCI). These commodity index-linked notes are sometimes referred to as &#8220;structured notes&#8221; because the terms of these notes may be structured by the issuer and the purchaser of the note. The Fund may also seek to gain exposure to the individual commodity components of the CMCI by investing in futures contracts that comprise the CMCI, either directly or indirectly through the Subsidiary.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">For tax reasons, it may be advantageous for the Fund to create and maintain its exposure to the commodity markets, in whole or in part, by investing in the Subsidiary. The Subsidiary has the same investment objective as the Fund and the portfolio of the Subsidiary is managed by the Adviser for the exclusive benefit of the Fund. As discussed in greater detail elsewhere in this prospectus, the Subsidiary (unlike the Fund) may invest without limitation in commodity-linked swap agreements and other commodity-linked derivative instruments including futures. The Fund may invest up to 25% of its assets in the Subsidiary.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The derivative instruments in which the Fund and the Subsidiary primarily intend to invest are instruments linked to commodity indices, such as the CMCI, and instruments linked to the value of a particular commodity or commodity futures contract, or a subset of commodities or commodity futures contracts. These instruments may specify exposure to commodity futures with different roll dates, reset dates or contract months than those specified by a particular commodity index. As a result, the commodity-linked derivatives component of the Fund&#8217;s portfolio may deviate from the returns of any particular commodity index. The Fund or the Subsidiary may over- weight or under-weight its exposure to a particular commodity index, or a subset of commodities, such that the Fund has greater or lesser exposure to that index than the value of the Fund&#8217;s net assets, or greater or lesser exposure to a subset of commodities than is represented by a particular commodity index. Such deviations may be the result of temporary market fluctuations, and under normal circumstances, the Fund will seek to maintain notional exposure to one or more commodity indices within 5% (plus or</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;">minus) of the value of the Fund&#8217;s net assets. To the extent the CMCI is concentrated in a particular industry (or one or more commodities that comprise an industry) the Fund will necessarily be concentrated in that industry.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Assets not invested in commodity-linked derivative instruments or the Subsidiary may be invested in Fixed Income Instruments, including derivative Fixed Income Instruments. The Fund is non-diversified, which means that it may invest its assets in a smaller number of issuers than a diversified fund.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The average duration of the portfolio of Fixed Income Instruments will vary based on interest rates and, under normal market conditions, is not expected to exceed five years. Duration is a measure of the expected life of a fixed income security that is used to determine the sensitivity of a security&#8217;s price to changes in interest rates. The longer a security&#8217;s duration, the more sensitive it will be to changes in interest rates. Similarly, a fund with a longer average portfolio duration will be more sensitive to changes in interest rates than a fund with a shorter average portfolio duration. By way of example, the price of a bond fund with an average duration of five years would be expected to fall approximately 5% if interest rates rose by one percentage point. The Fund will invest primarily in securities of the U.S. Government and its agencies and investment grade bonds of private issuers rated Baa or higher or, if unrated, determined by the Adviser to be of comparable quality. The Fund may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques (such as buy back or dollar rolls, repurchase agreements or reverse repurchase agreements). The Fund may also invest, without limitation, in money market funds.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Adviser may hire and terminate sub-advisers in accordance with the terms of an exemptive order obtained by the Fund and the Adviser from the SEC, under which the Adviser is permitted, subject to supervision and approval of the Board of Trustees, to enter into and materially amend sub-advisory agreements without seeking shareholder approval. The Adviser will furnish shareholders of the Fund with information regarding a new sub-adviser within 90 days of the hiring of the new sub-adviser. Currently, the Adviser has not hired a sub-adviser to assist with the portfolio management of the Fund.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse630false0rr_RiskHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL RISKSfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subsection b falsefalse631false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">There is no assurance that the Fund will achieve its investment objective. The Fund&#8217;s share price and return will fluctuate with changes in the market value of the Fund&#8217;s portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Commodities and Commodity-Linked Derivatives.</b> Exposure to the commodities markets, such as precious metals, industrial metals, gas and other energy products and natural resources, may subject the Fund to greater volatility than investments in traditional securities. The commodities markets may fluctuate widely based on a variety of factors including changes in overall market movements, political and economic events and policies, war, acts of terrorism, natural disasters and changes in interest rates or inflation rates. Because the value of a commodity-linked derivative instrument and structured note typically are based upon the price movements of physical commodities, the value of these securities will rise or fall in response to changes in the underlying commodities or related index of investment.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Counterparty.</b> A loss may be sustained as a result of the failure of another party to a contract (usually referred to as a &#8220;counterparty&#8221;) to make required payments or otherwise comply with a contract&#8217;s terms. The Fund also bears the risk of loss of the amount expected to be received under a swap agreement in the event of the default or bankruptcy of a swap agreement counterparty. In addition, the Fund may enter into swap agreements with a limited number of counterparties, and as of the date of this prospectus, UBS was the only available counterparty with which the Fund may enter into such swap contracts on the CMCI. The Fund may invest in commodity- linked structured notes issued by a limited number of issuers that will act as counterparties. The Fund&#8217;s use of one or a limited number of counterparties and its investments in commodity-linked structured notes issued by only a limited number of issuers increases the Fund&#8217;s exposure to counterparty credit risk. Swap agreements also may be considered to be illiquid. Further, there is a risk that no suitable counterparties are willing to enter into, or continue to enter into, transactions with the Fund and, as a result, the Fund may not be able to achieve its investment objective.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Debt Securities.</b> Debt securities are subject to credit risk and interest rate risk. Credit risk refers to the possibility that the issuer of a debt security will be unable to make interest payments or repay principal when it becomes due. Interest rate risk refers to fluctuations in the value of a debt security resulting from changes in the general level of interest rates.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Derivatives.</b> The use of swap agreements, options, futures contracts and structured notes, presents risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. The use of derivatives can lead to losses because of adverse movements in the price or value of the underlying security, commodity, asset, index or reference rate. Derivative strategies often involve leverage, which may exaggerate a loss, potentially causing the Fund to lose more money than it would have lost had it invested in the underlying security. Also, a liquid secondary market may not always exist for the Fund&#8217;s derivative positions at times when the Fund might wish to terminate or sell such positions and over the counter instruments may be illiquid.</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Industry Concentration.</b> The Fund may be subject to greater risks and market fluctuations than a fund whose portfolio has exposure to a broader range of industries. The Fund may be susceptible to financial, economic, political or market events, as well as government regulation, impacting a particular industry.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Market.</b> Market risk refers to the risk that the market prices of securities, commodities and related instruments that the Fund holds will rise or fall, sometimes rapidly or unpredictably. In general, equity securities and commodities tend to have greater price volatility than debt securities.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Non-Diversification.</b> A non-diversified fund&#8217;s greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund&#8217;s portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Regulatory.</b> Changes in the laws or regulations of the United States or the Cayman Islands could affect the operations of the Fund or the Subsidiary and impair the ability of the Fund to achieve its investment objective. For example, the U.S. Commodity Futures Trading Commission (&#8220;CFTC&#8221;) recently proposed amendments to existing regulations that, if adopted as proposed, would subject the Fund&#8217;s activities involving investments in futures contracts and similar instruments to regulation by the CFTC.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Repurchase and Reverse Repurchase Agreements.</b> A repurchase agreement exposes the Fund to the risk that the party that sells the security may default on its obligation to repurchase it. The Fund may lose money if it cannot sell the security at the agreed-upon time and price or the security loses value before it can be sold. A reverse repurchase agreement involves the risk that the market value of the securities the Fund is obligated to repurchase under the agreement may decline below the repurchase price.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Subsidiary.</b> By investing in the Subsidiary, the Fund is indirectly exposed to the risks associated with the Subsidiary&#8217;s investments. There is no guarantee that the investment objective of the Subsidiary will be achieved.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Tracking Error.</b> The Fund&#8217;s return may not match the return of the CMCI due to, among other factors, the Fund incurring operating expenses, and not being fully invested at all times as a result of cash inflows and cash reserves to meet redemptions.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringNarrative Risk Disclosure. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Clause instruction -Subsection b falsefalse632false0rr_RiskLoseMoneyrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00The Fund's share price and return will fluctuate with changes in the market value of the Fund's portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringSummarize the principal risks of investing in the Fund, including the risks to which the Fund's portfolio as a whole is subject and the circumstances reasonably likely to affect adversely the Fund's net asset value, yield, and total return. Unless the Fund is a Money Market Fund, disclose that loss of money is a risk of investing in the Fund. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Subsection b falsefalse633false0rr_RiskNondiversifiedStatusrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Non-Diversification. A non-diversified fund's greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund's portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIf applicable, state that the Fund is non-diversified, describe the effect of non-diversification (e.g., disclose that, compared with other funds, the Fund may invest a greater percentage of its assets in a particular issuer), and summarize the risks of investing in a non-diversified fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph iv -Subsection b falsefalse634false0rr_BarChartAndPerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PERFORMANCEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse635false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund commenced operations on December 31, 2010. Accordingly, the Fund does not have a full calendar year of performance.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse636false0rr_PerformanceOneYearOrLessrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00The Fund commenced operations on December 31, 2010. Accordingly, the Fund does not have a full calendar year of performance.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringFor a Fund that provides annual total returns for only one calendar year or for a Fund that does not include the bar chart because it does not have annual returns for a full calendar year, modify, as appropriate, the narrative explanation required by stating that the information gives some indication of the risks of an investment in the Fund by comparing the Fund's performance with a broad measure of market performance). Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph i -Subsection b Reference 2: 2 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 1 -Exhibit b -Subsection b falsefalse637false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse37falsefalseUSDtruefalse{dei_LegalEntityAxis} : Van Eck CM Commodity Index Fund {rr_ProspectusShareClassAxis} : Class A (Van Eck CM Commodity Index Fund) 4/14/2011 - 4/14/2011 USD ($) $c36_S000029608Member_C000090895Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseVan Eck CM Commodity Index Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000029608Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000090895Memberrr_ProspectusShareClassAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse638true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse639false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse640false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse641false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00750.0075falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse642false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse643false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00520.0052[5]falsefalsefalsefalsefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse644false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01520.0152falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse645false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0057-0.0057[6]falsefalsefalsefalsefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse646false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00950.0095falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse647false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue666666falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse648false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue975975falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse649false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue666666falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse650false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue975975falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse651false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse38falsefalseUSDtruefalse{dei_LegalEntityAxis} : Van Eck CM Commodity Index Fund {rr_ProspectusShareClassAxis} : Class I (Van Eck CM Commodity Index Fund) 4/14/2011 - 4/14/2011 USD ($) $c37_S000029608Member_C000090897Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseVan Eck CM Commodity Index Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000029608Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000090897Memberrr_ProspectusShareClassAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse652true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse653false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse654false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse655false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00750.0075falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse656false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse657false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00230.0023[5]falsefalsefalsefalsefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse658false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00980.0098falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse659false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0033-0.0033[6]falsefalsefalsefalsefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse660false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00650.0065falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse661false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue6666falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse662false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue279279falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse663false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue6666falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse664false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue279279falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse665false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturndetaildata1falsefalsefalse00falsefalsefalsefalsefalse39falsefalseUSDtruefalse{dei_LegalEntityAxis} : Van Eck CM Commodity Index Fund {rr_ProspectusShareClassAxis} : Class Y (Van Eck CM Commodity Index Fund) 4/14/2011 - 4/14/2011 USD ($) $c38_S000029608Member_C000090898Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseVan Eck CM Commodity Index Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000029608Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000090898Memberrr_ProspectusShareClassAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse666true0rr_RiskReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse667false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse668false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse669false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00750.0075falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse670false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse671false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00520.0052[5]falsefalsefalsefalsefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse672false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01270.0127falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse673false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0057-0.0057[6]falsefalsefalsefalsefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse674false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00700.0070falsefalsefalsefalsefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse675false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue7272falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse676false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue346346falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse677false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue7272falsefalsefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse678false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue346346falsetruefalsefalsefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse1Van Eck Associates Corporation (the "Adviser") has agreed to waive fees and/or pay Fund expenses to the extent necessary to prevent the operating expenses of the Fund (excluding acquired fund fees and expenses, interest expense, trading expenses, dividends on securities sold short, taxes and extraordinary expenses) from exceeding 1.95% for Class A, 2.50% for Class C, 1.25% for Class I, and 1.70% for Class Y of the Fund's average daily net assets per year until May 1, 2012. During such time, the expense limitation is expected to continue until the Board of Trustees acts to discontinue all or a portion of such expense limitation.2After 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. These returns are shown for one class of shares only; after tax-returns for the other classes may vary. Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-deferred account, such as a 401(k) plan or Investment Retirement Account.3Van Eck Associates Corporation (the "Adviser") has agreed to waive fees and/or pay Fund expenses to the extent necessary to prevent the operating expenses of the Fund (excluding acquired fund fees and expenses, interest expense, trading expenses, dividends on securities sold short, taxes and extraordinary expenses) from exceeding 1.38% for Class A, 2.20% for Class C, 1.00% for Class I, and 1.13% for Class Y of the Fund's average daily net assets per year until May 1, 2012. During such time, the expense limitation is expected to continue until the Board of Trustees acts to discontinue all or a portion of such expense limitation.4Van Eck Associates Corporation (the "Adviser") has agreed to waive fees and/or pay Fund expenses to the extent necessary to prevent the operating expenses of the Fund (excluding acquired fund fees and expenses, interest expense, trading expenses, dividends on securities sold short, taxes and extraordinary expenses) from exceeding 2.40% for Class A, 1.95% for Class I, and 2.00% for Class Y of the Fund's average daily net assets per year until May 1, 2012. During such time, the expense limitation is expected to continue until the Board of Trustees acts to discontinue all or a portion of such expense limitation.5Other expenses are based on estimated amounts for the current fiscal year.6Van Eck Associates Corporation (the "Adviser") has agreed to waive fees and/or pay Fund expenses to the extent necessary to prevent the operating expenses of the Fund (excluding acquired fund fees and expenses, interest expense, trading expenses, dividends on securities sold short, taxes and extraordinary expenses) from exceeding 0.95% for Class A, 0.65% for Class I, and 0.70% for Class Y of the Fund's average daily net assets per year until May 1, 2012. During such time, the expense limitation is expected to continue until the Board of Trustees acts to discontinue all or a portion of such expense limitation.1677Risk/Return Detail Data (USD $)NoRoundingUnKnownUnKnownUnKnowntruetrue GRAPHIC 11 BarChart3.jpg IDEA: XBRL DOCUMENT begin 644 BarChart3.jpg M_]C_X``02D9)1@`!`0$`8`!@``#_VP!#``8$!08%!`8&!08'!P8("A`*"@D) M"A0.#PP0%Q08&!<4%A8:'24?&ALC'!86("P@(R8G*2HI&1\M,"TH,"4H*2C_ MVP!#`0<'!PH("A,*"A,H&A8:*"@H*"@H*"@H*"@H*"@H*"@H*"@H*"@H*"@H M*"@H*"@H*"@H*"@H*"@H*"@H*"@H*"C_P``1"`$L`AP#`2(``A$!`Q$!_\0` M'P```04!`0$!`0$```````````$"`P0%!@<("0H+_\0`M1```@$#`P($`P4% M!`0```%]`0(#``01!1(A,4$&$U%A!R)Q%#*!D:$((T*QP152T?`D,V)R@@D* M%A<8&1HE)B7J#A(6&AXB)BI*3E)66EYB9FJ*CI*6FIZBIJK*SM+6VM[BYNL+#Q,7& MQ\C)RM+3U-76U]C9VN'BX^3EYN?HZ>KQ\O/T]?;W^/GZ_\0`'P$``P$!`0$! 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XML 15 R1.xml IDEA: Risk/Return Summary 2.2.0.25truefalse010000 - Document - Risk/Return Summary {Unlabeled}falsefalsetrue1falsefalseUSDtruefalse{dei_LegalEntityAxis} : Emerging Markets Fund 4/14/2011 - 4/14/2011 USD ($) $c1_S000009198Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalsecik0000768847_S000009198Memberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturn1falsefalsefalse00Emerging Markets FundEmerging Markets Fundfalsefalsefalsefalsefalse1falsefalseUSDtruefalse{dei_LegalEntityAxis} : Emerging Markets Fund 4/14/2011 - 4/14/2011 USD ($) $c1_S000009198Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalsecik0000768847_S000009198Memberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse3false0rr_RiskReturnHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00RISK/RETURNfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Investment Objectives/Goals Include the following information, in plain English under rule 421(d) under the Securities Act, in the order and subject matter indicatedReference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 falsefalse4false0rr_ObjectiveHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00INVESTMENT OBJECTIVEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse5false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Emerging Markets Fund seeks long-term capital appreciation by investing primarily in equity securities in emerging markets around the world.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse6false0rr_ExpenseHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00FUND FEES AND EXPENSESfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Fee Table Includes the following information, in plain English under rule 421(d) under the Securities Act, after Item 2 Fees and expenses of the Fund This table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Shareholder Fees (fees paid directly from your investment) Example 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 you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be You would pay the following expenses if you did not redeem your shares The Example does not reflect sales charges (loads) on reinvested dividends [and other distributions]. If these sales charges (loads) were included, your costs would be higher. Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. 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 __% of the average value of its whole portfolio. Instructions. A.3.instructions.6 New Funds. For purposes of this Item, a "New Fund" is a Fund that does not include in Form N-1A financial statements reporting operating results or that includes financial statements for the Fund's initial fiscal year reporting operating results for a period of 6 months or less. The following Instructions apply to New Funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph d -Subsection instructions falsefalse7false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds. More information about these and other discounts is available from your financial professional and in the &#8220;Shareholder Information&#8221; section of the Fund&#8217;s prospectus and in the &#8220;Availability of Discounts&#8221; and &#8220;Breakpoint Linkage Rules for Discounts&#8221; sections of the Fund&#8217;s Statement of Additional Information (&#8220;SAI&#8221;).</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse8false0rr_ShareholderFeesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Shareholder Fees (fees paid directly from your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subsection table falsefalse9false0rr_ShareholderFeesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact cik0000768847_S000009198Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact cik0000768847_S000009198Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsehttp://xbrl.sec.gov/rr/role/ShareholderFeesDatafalsefalse020010 - Schedule - Shareholder Feestruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009198MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024992Memberrr_ProspectusShareClassAxisexplicitMemberEmerging Markets FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009198MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024993Memberrr_ProspectusShareClassAxisexplicitMemberEmerging Markets FundClass CusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009198MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000033045Memberrr_ProspectusShareClassAxisexplicitMemberEmerging Markets FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$4falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009198MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088110Memberrr_ProspectusShareClassAxisexplicitMemberEmerging Markets FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.05750.0575falsefalsefalsetruefalse6truetruetrue0.00000.0000falsefalsefalsetruefalse7truetruetrue0.00000.0000falsefalsefalsetruefalse8truetruetrue0.00000.0000falsefalsefalsetruefalse9truetruetrue0.05750.0575falsefalsefalsetruefalse10truetruetrue0.00000.0000falsefalsefalsetruefalse11truetruetrue0.00000.0000falsefalsefalsetruefalse12truetruetrue0.00000.0000falsefalsefalsetruefalse13truetruetrue0.05750.0575falsefalsefalsetruefalse14truetruetrue0.00000.0000falsefalsefalsetruefalse15truetruetrue0.00000.0000falsefalsefalsetruefalse16truetruetrue0.05750.0575falsefalsefalsetruefalse17truetruetrue0.00000.0000falsefalsefalsetruefalse18truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*4false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.00000.0000falsefalsefalsetruefalse6truetruetrue0.01000.0100falsefalsefalsetruefalse7truetruetrue0.00000.0000falsefalsefalsetruefalse8truetruetrue0.00000.0000falsefalsefalsetruefalse9truetruetrue0.00000.0000falsefalsefalsetruefalse10truetruetrue0.01000.0100falsefalsefalsetruefalse11truetruetrue0.00000.0000falsefalsefalsetruefalse12truetruetrue0.00000.0000falsefalsefalsetruefalse13truetruetrue0.00000.0000falsefalsefalsetruefalse14truetruetrue0.00000.0000falsefalsefalsetruefalse15truetruetrue0.00000.0000falsefalsefalsetruefalse16truetruetrue0.00000.0000falsefalsefalsetruefalse17truetruetrue0.00000.0000falsefalsefalsetruefalse18truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse0rr_MaximumDeferredSalesChargeOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse42Shareholder Fees Emerging Markets FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009198MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ShareholderFeesData.No authoritative reference available.falsefalse10false0rr_OperatingExpensesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 7 -Subsection table falsefalse11false0rr_AnnualFundOperatingExpensesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact cik0000768847_S000009198Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact cik0000768847_S000009198Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsehttp://xbrl.sec.gov/rr/role/OperatingExpensesDatafalsefalse020020 - Schedule - Annual Fund Operating Expensestruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009198MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024992Memberrr_ProspectusShareClassAxisexplicitMemberEmerging Markets FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009198MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024993Memberrr_ProspectusShareClassAxisexplicitMemberEmerging Markets FundClass CusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009198MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000033045Memberrr_ProspectusShareClassAxisexplicitMemberEmerging Markets FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$4falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009198MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088110Memberrr_ProspectusShareClassAxisexplicitMemberEmerging Markets FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00750.0075falsefalsefalsetruefalse2truetruetrue0.00750.0075falsefalsefalsetruefalse3truetruetrue0.00750.0075falsefalsefalsetruefalse4truetruetrue0.00750.0075falsefalsefalsetruefalse5truetruetrue0.00980.0098falsefalsefalsetruefalse6truetruetrue0.00980.0098falsefalsefalsetruefalse7truetruetrue0.00980.0098falsefalsefalsetruefalse8truetruetrue0.00980.0098falsefalsefalsetruefalse9truetruetrue0.00630.0063falsefalsefalsetruefalse10truetruetrue0.00630.0063falsefalsefalsetruefalse11truetruetrue0.00630.0063falsefalsefalsetruefalse12truetruetrue0.00630.0063falsefalsefalsetruefalse13truetruetrue0.01320.0132falsefalsefalsetruefalse14truetruetrue0.01320.0132falsefalsefalsetruefalse15truetruetrue0.01320.0132falsefalsefalsetruefalse16truetruetrue0.00750.0075falsefalsefalsetruefalse17truetruetrue0.00750.0075falsefalsefalsetruefalse18truetruetrue0.00750.0075falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse0rr_ManagementFeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00750.0075falsefalsefalsetruefalse2truetruetrue0.00750.0075falsefalsefalsetruefalse3truetruetrue0.00750.0075falsefalsefalsetruefalse4truetruetrue0.00750.0075falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*4false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.00250.0025falsefalsefalsetruefalse6truetruetrue0.01000.0100falsefalsefalsetruefalse7truetruetrue0.00000.0000falsefalsefalsetruefalse8truetruetrue0.00000.0000falsefalsefalsetruefalse9truetruetrue0.00250.0025falsefalsefalsetruefalse10truetruetrue0.01000.0100falsefalsefalsetruefalse11truetruetrue0.00000.0000falsefalsefalsetruefalse12truetruetrue0.00000.0000falsefalsefalsetruefalse13truetruetrue0.00250.0025falsefalsefalsetruefalse14truetruetrue0.00000.0000falsefalsefalsetruefalse15truetruetrue0.00000.0000falsefalsefalsetruefalse16truetruetrue0.00250.0025falsefalsefalsetruefalse17truetruetrue0.00000.0000falsefalsefalsetruefalse18truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse0rr_DistributionAndService12b1FeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse3falseRowprimaryElement*7false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00740.0074falsefalsefalsetruefalse2truetruetrue0.00860.0086falsefalsefalsetruefalse3truetruetrue0.01480.0148falsefalsefalsetruefalse4truetruetrue0.00980.0098falsefalsefalsetruefalse5truetruetrue0.00190.0019falsefalsefalsetruefalse6truetruetrue0.00170.0017falsefalsefalsetruefalse7truetruetrue0.00060.0006falsefalsefalsetruefalse8truetruetrue0.00110.0011falsefalsefalsetruefalse9truetruetrue0.00360.0036falsefalsefalsetruefalse10truetruetrue0.00310.0031falsefalsefalsetruefalse11truetruetrue0.00370.0037falsefalsefalsetruefalse12truetruetrue0.00470.0047falsefalsefalsetruefalse13falsetruetrue00falsefalsefalsetruefalse14falsetruetrue00falsefalsefalsetruefalse15falsetruetrue00falsefalsefalsetruefalse16truetruetrue0.00520.0052[1]falsefalsefalsetruefalse17truetruetrue0.00230.0023[1]falsefalsefalsetruefalse18truetruetrue0.00520.0052[1]falsefalsefalsetruefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse0rr_OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00740.0074falsefalsefalsetruefalse2truetruetrue0.00860.0086falsefalsefalsetruefalse3truetruetrue0.01480.0148falsefalsefalsetruefalse4truetruetrue0.00980.0098falsefalsefalsetruefalseOthernanafalsefalse4falseRowprimaryElement*9false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01740.0174falsefalsefalsetruefalse2truetruetrue0.02610.0261falsefalsefalsetruefalse3truetruetrue0.02230.0223falsefalsefalsetruefalse4truetruetrue0.01730.0173falsefalsefalsetruefalse5truetruetrue0.01430.0143falsefalsefalsetruefalse6truetruetrue0.02160.0216falsefalsefalsetruefalse7truetruetrue0.01050.0105falsefalsefalsetruefalse8truetruetrue0.01100.0110falsefalsefalsetruefalse9truetruetrue0.01250.0125falsefalsefalsetruefalse10truetruetrue0.01950.0195falsefalsefalsetruefalse11truetruetrue0.01010.0101falsefalsefalsetruefalse12truetruetrue0.01110.0111falsefalsefalsetruefalse13truetruetrue0.03370.0337falsefalsefalsetruefalse14truetruetrue0.03130.0313falsefalsefalsetruefalse15truetruetrue0.03060.0306falsefalsefalsetruefalse16truetruetrue0.01520.0152falsefalsefalsetruefalse17truetruetrue0.00980.0098falsefalsefalsetruefalse18truetruetrue0.01270.0127falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse0rr_ExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01740.0174falsefalsefalsetruefalse2truetruetrue0.02610.0261falsefalsefalsetruefalse3truetruetrue0.02230.0223falsefalsefalsetruefalse4truetruetrue0.01730.0173falsefalsefalsetruefalseOthernanafalsefalse5falseRowprimaryElement*10false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000[4]falsefalsefalsetruefalse2truetruetrue-0.0011-0.0011[4]falsefalsefalsetruefalse3truetruetrue-0.0098-0.0098[4]falsefalsefalsetruefalse4truetruetrue-0.0003-0.0003[4]falsefalsefalsetruefalse5truetruetrue-0.0004-0.0004[3]falsefalsefalsetruefalse6truetruetrue0.00000.0000[3]falsefalsefalsetruefalse7truetruetrue-0.0004-0.0004[3]falsefalsefalsetruefalse8truetruetrue0.00000.0000[3]falsefalsefalsetruefalse9falsetruetrue00falsefalsefalsetruefalse10falsetruetrue00falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.00000.0000[5]falsefalsefalsetruefalse14truetruetrue-0.0013-0.0013[5]falsefalsefalsetruefalse15truetruetrue0.00000.0000[5]falsefalsefalsetruefalse16truetruetrue-0.0057-0.0057[2]falsefalsefalsetruefalse17truetruetrue-0.0033-0.0033[2]falsefalsefalsetruefalse18truetruetrue-0.0057-0.0057[2]falsefalsefalsetruefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse0rr_FeeWaiverOrReimbursementOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1truetruetrue0.00000.0000falsefalsefalsetruefalse2truetruetrue-0.0011-0.0011falsefalsefalsetruefalse3truetruetrue-0.0098-0.0098falsefalsefalsetruefalse4truetruetrue-0.0003-0.0003falsefalsefalsetruefalseOthernanafalsefalse6falseRowprimaryElement*11false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01740.0174falsefalsefalsetruefalse2truetruetrue0.02500.0250falsefalsefalsetruefalse3truetruetrue0.01250.0125falsefalsefalsetruefalse4truetruetrue0.01700.0170falsefalsefalsetruefalse5truetruetrue0.01390.0139falsefalsefalsetruefalse6truetruetrue0.02160.0216falsefalsefalsetruefalse7truetruetrue0.01010.0101falsefalsefalsetruefalse8truetruetrue0.01100.0110falsefalsefalsetruefalse9falsetruetrue00falsefalsefalsetruefalse10falsetruetrue00falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.03370.0337falsefalsefalsetruefalse14truetruetrue0.03000.0300falsefalsefalsetruefalse15truetruetrue0.03060.0306falsefalsefalsetruefalse16truetruetrue0.00950.0095falsefalsefalsetruefalse17truetruetrue0.00650.0065falsefalsefalsetruefalse18truetruetrue0.00700.0070falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse0rr_NetExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01740.0174falsefalsefalsetruefalse2truetruetrue0.02500.0250falsefalsefalsetruefalse3truetruetrue0.01250.0125falsefalsefalsetruefalse4truetruetrue0.01700.0170falsefalsefalsetruefalseOthernanafalsefalse1Van Eck Associates Corporation (the "Adviser") has agreed to waive fees and/or pay Fund expenses to the extent necessary to prevent the operating expenses of the Fund (excluding acquired fund fees and expenses, interest expense, trading expenses, dividends on securities sold short, taxes and extraordinary expenses) from exceeding 1.95% for Class A, 2.50% for Class C, 1.25% for Class I, and 1.70% for Class Y of the Fund's average daily net assets per year until May 1, 2012. During such time, the expense limitation is expected to continue until the Board of Trustees acts to discontinue all or a portion of such expense limitation.46Annual Fund Operating Expenses Emerging Markets FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009198MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to OperatingExpensesData.No authoritative reference available.falsefalse12false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Expense ExamplefalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse13false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following 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 either redeem all of your shares at the end of these periods or continue to hold them. The example also assumes that your investment has a 5% return each year and that the Fund&#8217;s operating expenses remain the same. Although your actual expenses may be higher or lower, based on these assumptions, your costs would be:</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThe Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection example falsefalse14false0rr_ExpenseExampleByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00SoldfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse15false0rr_ExpenseExampleWithRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact cik0000768847_S000009198Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact cik0000768847_S000009198Member column rr_ProspectusShareClassAxis compact * row primary compact * ~truehttp://xbrl.sec.gov/rr/role/ExpenseExamplefalsefalse020030 - Schedule - Expense Example {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue742742falsefalsefalsetruefalse2truefalsetrue353353falsefalsefalsetruefalse3truefalsetrue127127falsefalsefalsetruefalse4truefalsetrue173173falsefalsefalsetruefalse5truefalsetrue708708falsefalsefalsetruefalse6truefalsetrue319319falsefalsefalsetruefalse7truefalsetrue103103falsefalsefalsetruefalse8truefalsetrue112112falsefalsefalsetruefalse9truefalsetrue695695falsefalsefalsetruefalse10truefalsetrue298298falsefalsefalsetruefalse11truefalsetrue103103falsefalsefalsetruefalse12truefalsetrue113113falsefalsefalsetruefalse13truefalsetrue340340falsefalsefalsetruefalse14truefalsetrue303303falsefalsefalsetruefalse15truefalsetrue309309falsefalsefalsetruefalse16truefalsetrue666666falsefalsefalsetruefalse17truefalsetrue6666falsefalsefalsetruefalse18truefalsetrue7272falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalsefalseUSDfalsefalse$2falseColumnprimaryElement*4false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue10911091falsefalsefalsetruefalse2truefalsetrue801801falsefalsefalsetruefalse3truefalsetrue603603falsefalsefalsetruefalse4truefalsetrue542542falsefalsefalsetruefalse5truefalsetrue998998falsefalsefalsetruefalse6truefalsetrue676676falsefalsefalsetruefalse7truefalsetrue330330falsefalsefalsetruefalse8truefalsetrue350350falsefalsefalsetruefalse9truefalsetrue949949falsefalsefalsetruefalse10truefalsetrue612612falsefalsefalsetruefalse11truefalsetrue322322falsefalsefalsetruefalse12truefalsetrue353353falsefalsefalsetruefalse13truefalsetrue10361036falsefalsefalsetruefalse14truefalsetrue954954falsefalsefalsetruefalse15truefalsetrue945945falsefalsefalsetruefalse16truefalsetrue975975falsefalsefalsetruefalse17truefalsetrue279279falsefalsefalsetruefalse18truefalsetrue346346falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalseUSDfalsefalse$3falseColumnprimaryElement*5false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue14641464falsefalsefalsetruefalse2truefalsetrue13751375falsefalsefalsetruefalse3truefalsetrue11051105falsefalsefalsetruefalse4truefalsetrue936936falsefalsefalsetruefalse5truefalsetrue13081308falsefalsefalsetruefalse6truefalsetrue11591159falsefalsefalsetruefalse7truefalsetrue575575falsefalsefalsetruefalse8truefalsetrue606606falsefalsefalsetruefalse9truefalsetrue12221222falsefalsefalsetruefalse10truefalsetrue10521052falsefalsefalsetruefalse11truefalsetrue558558falsefalsefalsetruefalse12truefalsetrue612612falsefalsefalsetruefalse13truefalsetrue17551755falsefalsefalsetruefalse14truefalsetrue16291629falsefalsefalsetruefalse15truefalsetrue16061606falsefalsefalsetruefalse16falsefalsetrue00falsefalsefalsetruefalse17falsefalsetrue00falsefalsefalsetruefalse18falsefalsetrue00falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalseUSDfalsefalse$4falseColumnprimaryElement*6false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue25092509falsefalsefalsetruefalse2truefalsetrue29362936falsefalsefalsetruefalse3truefalsetrue24882488falsefalsefalsetruefalse4truefalsetrue20382038falsefalsefalsetruefalse5truefalsetrue21862186falsefalsefalsetruefalse6truefalsetrue24932493falsefalsefalsetruefalse7truefalsetrue12791279falsefalsefalsetruefalse8truefalsetrue13401340falsefalsefalsetruefalse9truefalsetrue19991999falsefalsefalsetruefalse10truefalsetrue22752275falsefalsefalsetruefalse11truefalsetrue12361236falsefalsefalsetruefalse12truefalsetrue13521352falsefalsefalsetruefalse13truefalsetrue36583658falsefalsefalsetruefalse14truefalsetrue34303430falsefalsefalsetruefalse15truefalsetrue33743374falsefalsefalsetruefalse16falsefalsetrue00falsefalsefalsetruefalse17falsefalsetrue00falsefalsefalsetruefalse18falsefalsetrue00falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009198MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024992Memberrr_ProspectusShareClassAxisexplicitMemberEmerging Markets FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue742742falsefalsefalsetruefalse2truefalsetrue10911091falsefalsefalsetruefalse3truefalsetrue14641464falsefalsefalsetruefalse4truefalsetrue25092509falsefalsefalsetruefalseOthernanafalsefalse2falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009198MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024993Memberrr_ProspectusShareClassAxisexplicitMemberEmerging Markets FundClass CusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue353353falsefalsefalsetruefalse2truefalsetrue801801falsefalsefalsetruefalse3truefalsetrue13751375falsefalsefalsetruefalse4truefalsetrue29362936falsefalsefalsetruefalseOthernanafalsefalse3falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009198MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000033045Memberrr_ProspectusShareClassAxisexplicitMemberEmerging Markets FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue127127falsefalsefalsetruefalse2truefalsetrue603603falsefalsefalsetruefalse3truefalsetrue11051105falsefalsefalsetruefalse4truefalsetrue24882488falsefalsefalsetruefalseOthernanafalsefalse4falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009198MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088110Memberrr_ProspectusShareClassAxisexplicitMemberEmerging Markets FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue173173falsefalsefalsetruefalse2truefalsetrue542542falsefalsefalsetruefalse3truefalsetrue936936falsefalsefalsetruefalse4truefalsetrue20382038falsefalsefalsetruefalseOthernanafalsefalse44Expense Example Emerging Markets Fund (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009198MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExample.No authoritative reference available.falsefalse16false0rr_ExpenseExampleNoRedemptionByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00HeldfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse17false0rr_ExpenseExampleNoRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption column dei_LegalEntityAxis compact cik0000768847_S000009198Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption column dei_LegalEntityAxis compact cik0000768847_S000009198Member column rr_ProspectusShareClassAxis compact * row primary compact * ~truehttp://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemptionfalsefalse020040 - Schedule - Expense Example, No Redemption {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue742742falsefalsefalsetruefalse2truefalsetrue253253falsefalsefalsetruefalse3truefalsetrue127127falsefalsefalsetruefalse4truefalsetrue173173falsefalsefalsetruefalse5truefalsetrue708708falsefalsefalsetruefalse6truefalsetrue219219falsefalsefalsetruefalse7truefalsetrue103103falsefalsefalsetruefalse8truefalsetrue112112falsefalsefalsetruefalse9truefalsetrue695695falsefalsefalsetruefalse10truefalsetrue198198falsefalsefalsetruefalse11truefalsetrue103103falsefalsefalsetruefalse12truefalsetrue113113falsefalsefalsetruefalse13truefalsetrue340340falsefalsefalsetruefalse14truefalsetrue303303falsefalsefalsetruefalse15truefalsetrue309309falsefalsefalsetruefalse16truefalsetrue666666falsefalsefalsetruefalse17truefalsetrue6666falsefalsefalsetruefalse18truefalsetrue7272falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalsefalseUSDfalsefalse$2falseColumnprimaryElement*4false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue10911091falsefalsefalsetruefalse2truefalsetrue801801falsefalsefalsetruefalse3truefalsetrue603603falsefalsefalsetruefalse4truefalsetrue542542falsefalsefalsetruefalse5truefalsetrue998998falsefalsefalsetruefalse6truefalsetrue676676falsefalsefalsetruefalse7truefalsetrue330330falsefalsefalsetruefalse8truefalsetrue350350falsefalsefalsetruefalse9truefalsetrue949949falsefalsefalsetruefalse10truefalsetrue612612falsefalsefalsetruefalse11truefalsetrue322322falsefalsefalsetruefalse12truefalsetrue353353falsefalsefalsetruefalse13truefalsetrue10361036falsefalsefalsetruefalse14truefalsetrue954954falsefalsefalsetruefalse15truefalsetrue945945falsefalsefalsetruefalse16truefalsetrue975975falsefalsefalsetruefalse17truefalsetrue279279falsefalsefalsetruefalse18truefalsetrue346346falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. 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Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 5 -Subsection instructions falsefalse19false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 110% of the average value of its portfolio.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalse20false0rr_StrategyHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL INVESTMENT STRATEGIESfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse21false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Under normal conditions, the Fund invests at least 80% of its net assets in securities of companies that are organized in, maintain at least 50% of their assets in, or derive at least 50% of their revenues from, emerging market countries. An emerging market country is any country that has been determined by an international organization, such as the World Bank, to have a low to middle income economy. The Fund is considered to be &#8220;non-diversified&#8221; which means that it may invest in fewer securities than a &#8220;diversified&#8221; fund.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Utilizing qualitative and quantitative measures, the Fund&#8217;s portfolio manager selects companies that have growth potential, specifically focusing on small- to mid- capitalization companies. Candidates for the Fund&#8217;s portfolio are ranked based on their relative desirability based on a wide range of financial criteria and are regularly reviewed to ensure that they continue to meet the ranking and desirability criteria.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund&#8217;s holdings may include issues denominated in currencies of emerging countries, investment companies (like country funds) that invest in emerging countries, and American Depositary Receipts, and similar types of investments, representing emerging markets securities.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may use derivative instruments, such as structured notes, futures, options and swap agreements, to gain or hedge exposure.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may invest up to 20% of its net assets in securities issued by other investment companies, including exchange-traded funds (&#8220;ETFs&#8221;). The Fund may also invest in money market funds, but these investments are not subject to this limitation. The Fund may invest in ETFs to participate in, or gain rapid exposure to, certain market sectors, or when direct investments in certain countries are not permitted.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse22false0rr_RiskHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL RISKSfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subsection b falsefalse23false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">There is no assurance that the Fund will achieve its investment objective. The Fund&#8217;s share price and return will fluctuate with changes in the market value of the Fund&#8217;s portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Derivatives.</b> The use of derivatives, such as swap agreements, options, warrants, futures contracts, currency forwards and structured notes, presents risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. The use of derivatives can lead to losses because of adverse movements in the price or value of the underlying security, asset, index or reference rate. Derivative strategies often involve leverage, which may exaggerate a loss, potentially causing a Fund to lose more money than it would have lost had it invested in the underlying security. Also, a liquid secondary market may not always exist for the Fund&#8217;s derivative positions at times when the Fund might wish to terminate or sell such positions and over the counter instruments may be illiquid.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Direct Investments.</b> Direct investments may involve a high degree of business and financial risk that can result in substantial losses. Because of the absence of any public trading market for these investments, a Fund may take longer to liquidate these positions than would be the case for publicly traded securities. Direct investments are generally considered illiquid and will be aggregated with other illiquid investments for purposes of the limitation on illiquid investments.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Emerging Markets Securities.</b> Emerging markets securities typically present even greater exposure to the risks described under &#8220;Foreign Securities&#8221; and may be particularly sensitive to certain economic changes. Emerging markets securities are exposed to a number of risks that may make these investments volatile in price or difficult to trade.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Foreign Currency Transactions.</b> An investment transacted in a foreign currency may lose value due to fluctuations in the rate of exchange. These fluctuations can make the return on an investment go up or down, entirely apart from the quality or performance of the investment itself.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Foreign Securities.</b> Foreign investments are subject to greater risks than U.S. domestic investments. These additional risks may include exchange rate fluctuations and exchange controls; less publicly available information; more volatile or less liquid securities markets; and the possibility of arbitrary action by foreign governments, or political, economic or social instability. Foreign companies also may be subject to significantly higher levels of taxation than U.S. companies, including potentially confiscatory levels of taxation, thereby reducing the earnings potential of such foreign companies.</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Investments in Other Investment Companies.</b> A Fund&#8217;s investment in another investment company may subject the Fund indirectly to the underlying risks of the investment company. The Fund also will bear its share of the underlying investment company&#8217;s fees and expenses, which are in addition to the Fund&#8217;s own fees and expenses.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Market.</b> Market risk refers to the risk that the market prices of securities that a Fund holds will rise or fall, sometimes rapidly or unpredictably. In general, equity securities tend to have greater price volatility than debt securities.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Non-Diversification.</b> A non-diversified fund&#8217;s greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund&#8217;s portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Small- and Medium-Capitalization Companies.</b> Securities of small- and medium-sized companies often have greater price volatility, lower trading volume and less liquidity than larger more established companies. The stocks of small- and medium-sized companies may have returns that vary, sometimes significantly, from the overall stock market.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringNarrative Risk Disclosure. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Clause instruction -Subsection b falsefalse24false0rr_BarChartAndPerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PERFORMANCEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse25false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund&#8217;s performance from year to year and by showing how the Fund&#8217;s average annual total returns compare with those of a broad measure of market performance and one or more other performance measures. For instance, the Morgan Stanley Capital International (MSCI) Emerging Markets Index, calculated with dividends reinvested, captures 60% of the publicly traded equities in each industry for approximately 25 emerging markets. The Fund&#8217;s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. The annual returns in the bar chart are for the Fund&#8217;s Class&#160;A shares and do not reflect sales loads. If sales loads were reflected, returns would be less than those shown.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Additionally, large purchases and/or redemptions of shares of a class, relative to the amount of assets represented by the class, may cause the annual returns for each class to differ. Updated performance information for the Fund is available on the Van Eck website at vaneck.com.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse26false0rr_BarChartNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p align="center"><font style="font-family:sans-serif; font-size:3.5mm;"></font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringProvide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph i -Subsection b falsefalse27false0rr_BarChartHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00CLASS A: Annual Total Returns (%) as of 12/31falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse28false0rr_BarChartTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact cik0000768847_S000009198Member column rr_ProspectusShareClassAxis compact cik0000768847_C000024992Member row primary compact * ~falsefalseBarChart1.jpg~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact cik0000768847_S000009198Member column rr_ProspectusShareClassAxis compact cik0000768847_C000024992Member row primary compact * ~falsehttp://xbrl.sec.gov/rr/role/BarChartDatafalsefalse020050 - Schedule - Annual Total Returnstruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009198MemberColumnrr_ProspectusShareClassAxisAxiscik0000768847_C000024992MemberColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024992Memberrr_ProspectusShareClassAxisexplicitMemberEmerging Markets FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_AnnualReturn2001rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.2732-0.2732falsefalsefalsetruefalse2truetruefalse-0.0856-0.0856falsefalsefalsetruefalse3truetruefalse0.20740.2074falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse0rr_AnnualReturn2001truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.2732-0.2732falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*4false0rr_AnnualReturn2002rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.2504-0.2504falsefalsefalsetruefalse2truetruefalse0.06770.0677falsefalsefalsetruefalse3truetruefalse0.90480.9048falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse0rr_AnnualReturn2002truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.2504-0.2504falsefalsefalsetruefalseOthernanafalsefalse3falseRowprimaryElement*5false0rr_AnnualReturn2003rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.75050.7505falsefalsefalsetruefalse2truetruefalse0.42440.4244falsefalsefalsetruefalse3truetruefalse0.44250.4425falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse0rr_AnnualReturn2003truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.75050.7505falsefalsefalsetruefalseOthernanafalsefalse4falseRowprimaryElement*6false0rr_AnnualReturn2004rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.19790.1979falsefalsefalsetruefalse2truetruefalse0.22870.2287falsefalsefalsetruefalse3truetruefalse-0.0773-0.0773falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse0rr_AnnualReturn2004truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.19790.1979falsefalsefalsetruefalseOthernanafalsefalse5falseRowprimaryElement*7false0rr_AnnualReturn2005rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.29770.2977falsefalsefalsetruefalse2truetruefalse0.48720.4872falsefalsefalsetruefalse3truetruefalse0.35620.3562falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse0rr_AnnualReturn2005truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.29770.2977falsefalsefalsetruefalseOthernanafalsefalse6falseRowprimaryElement*8false0rr_AnnualReturn2006rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.38980.3898falsefalsefalsetruefalse2truetruefalse0.22860.2286falsefalsefalsetruefalse3truetruefalse0.45230.4523falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse0rr_AnnualReturn2006truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.38980.3898falsefalsefalsetruefalseOthernanafalsefalse7falseRowprimaryElement*9false0rr_AnnualReturn2007rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.35660.3566falsefalsefalsetruefalse2truetruefalse0.42620.4262falsefalsefalsetruefalse3truetruefalse0.27410.2741falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse0rr_AnnualReturn2007truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.35660.3566falsefalsefalsetruefalseOthernanafalsefalse8falseRowprimaryElement*10false0rr_AnnualReturn2008rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.6812-0.6812falsefalsefalsetruefalse2truetruefalse-0.4468-0.4468falsefalsefalsetruefalse3truetruefalse-0.2903-0.2903falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse0rr_AnnualReturn2008truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.6812-0.6812falsefalsefalsetruefalseOthernanafalsefalse9falseRowprimaryElement*11false0rr_AnnualReturn2009rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse1.20371.2037falsefalsefalsetruefalse2truetruefalse0.52460.5246falsefalsefalsetruefalse3truetruefalse0.63750.6375falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse0rr_AnnualReturn2009truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse1.20371.2037falsefalsefalsetruefalseOthernanafalsefalse10falseRowprimaryElement*12false0rr_AnnualReturn2010rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.28170.2817falsefalsefalsetruefalse2truetruefalse0.28430.2843falsefalsefalsetruefalse3truetruefalse0.50990.5099falsefalsefalsetruefalse4truetruefalse0.04560.0456falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse0rr_AnnualReturn2010truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.28170.2817falsefalsefalsetruefalseOthernanafalsefalse110Annual Total Returns UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009198MemberColumnrr_ProspectusShareClassAxisAxiscik0000768847_C000024992MemberColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to BarChartData.No authoritative reference available.falsefalse29false0rr_BarChartClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<table cellspacing="0" style="margin-left:0.00%;margin-right:0.00%;width:100.00%;"> <tr valign="top"> <td style="width:13.69%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:8.73%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:77.58%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> </tr> <tr valign="top"> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Best Quarter:</b></font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">+59.06%</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">2Q &#8217;09</font></p> </td> </tr> <tr valign="top"> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Worst Quarter:</b></font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">-38.59%</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">4Q &#8217;08</font></p> </td> </tr> </table>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse30false0rr_AverageAnnualReturnCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Average Annual Total Returns as of 12/31/10falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 5 -Subsection b falsefalse31false0rr_PerformanceTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact cik0000768847_S000009198Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact cik0000768847_S000009198Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~truehttp://xbrl.sec.gov/rr/role/PerformanceTableDatafalsefalse020060 - Schedule - Average Annual Total Returns {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.20830.2083falsefalsefalsetruefalse2truetruetrue0.20720.2072[1]falsefalsefalsetruefalse3truetruetrue0.13540.1354[1]falsefalsefalsetruefalse4truetruetrue0.26160.2616falsefalsefalsetruefalse5truetruetrue0.28750.2875falsefalsefalsetruefalse6falsetruetrue00falsefalsefalsetruefalse7truetruetrue0.21040.2104falsefalsefalsetruefalse8truetruetrue0.20860.2086[1]falsefalsefalsetruefalse9truetruetrue0.13670.1367[1]falsefalsefalsetruefalse10truetruetrue0.26440.2644falsefalsefalsetruefalse11truetruetrue0.28930.2893falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.42340.4234falsefalsefalsetruefalse14truetruetrue0.37130.3713[1]falsefalsefalsetruefalse15truetruetrue0.28940.2894[1]falsefalsefalsetruefalse16truetruetrue0.48890.4889falsefalsefalsetruefalse17truetruetrue0.51470.5147falsefalsefalsetruefalse18falsetruetrue00falsefalsefalsetruefalse19truetruetrue-0.0146-0.0146falsefalsefalsetruefalse20truetruetrue-0.0190-0.0190[1]falsefalsefalsetruefalse21truetruetrue-0.0094-0.0094[1]falsefalsefalsetruefalse22truetruetrue0.04890.0489falsefalsefalsetruefalse23falsetruetrue00falsefalsefalsetruefalse24truetruetrue0.19200.1920falsefalsefalsetruefalse25truetruetrue0.23880.2388falsefalsefalsetruefalse26truetruetrue0.15060.1506falsefalsefalsetruefalse27truetruetrue0.34750.3475falsefalsefalsetruefalse28truetruetrue0.15060.1506falsefalsefalsetruefalse29truetruetrue0.05190.0519falsefalsefalsetruefalse30truetruetrue0.15060.1506falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalsefalseUSDfalsefalse$2falseColumnprimaryElement*4false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.09850.0985falsefalsefalsetruefalse2truetruetrue0.08460.0846[1]falsefalsefalsetruefalse3truetruetrue0.07980.0798[1]falsefalsefalsetruefalse4truetruetrue0.10360.1036falsefalsefalsetruefalse5falsetruetrue00falsefalsefalsetruefalse6falsetruetrue00falsefalsefalsetruefalse7truetruetrue0.12330.1233falsefalsefalsetruefalse8truetruetrue0.11440.1144[1]falsefalsefalsetruefalse9truetruetrue0.10420.1042[1]falsefalsefalsetruefalse10truetruetrue0.12810.1281falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.25080.2508falsefalsefalsetruefalse14truetruetrue0.22070.2207[1]falsefalsefalsetruefalse15truetruetrue0.20560.2056[1]falsefalsefalsetruefalse16truetruetrue0.25650.2565falsefalsefalsetruefalse17falsetruetrue00falsefalsefalsetruefalse18falsetruetrue00falsefalsefalsetruefalse19falsetruetrue00falsefalsefalsetruefalse20falsetruetrue00falsefalsefalsetruefalse21falsetruetrue00falsefalsefalsetruefalse22falsetruetrue00falsefalsefalsetruefalse23falsetruetrue00falsefalsefalsetruefalse24truetruetrue0.13100.1310falsefalsefalsetruefalse25truetruetrue0.08980.0898falsefalsefalsetruefalse26truetruetrue0.02290.0229falsefalsefalsetruefalse27truetruetrue0.14650.1465falsefalsefalsetruefalse28truetruetrue0.02290.0229falsefalsefalsetruefalse29falsetruetrue00falsefalsefalsetruefalse30falsetruetrue00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalsefalseUSDfalsefalse$3falseColumnprimaryElement*5false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.09020.0902falsefalsefalsetruefalse2truetruetrue0.07910.0791[1]falsefalsefalsetruefalse3truetruetrue0.07480.0748[1]falsefalsefalsetruefalse4falsetruetrue00falsefalsefalsetruefalse5falsetruetrue00falsefalsefalsetruefalse6falsetruetrue00falsefalsefalsetruefalse7truetruetrue0.16350.1635falsefalsefalsetruefalse8truetruetrue0.15890.1589[1]falsefalsefalsetruefalse9truetruetrue0.14690.1469[1]falsefalsefalsetruefalse10truetruetrue0.16170.1617falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.28950.2895falsefalsefalsetruefalse14truetruetrue0.26260.2626[1]falsefalsefalsetruefalse15truetruetrue0.25070.2507[1]falsefalsefalsetruefalse16falsetruetrue00falsefalsefalsetruefalse17falsetruetrue00falsefalsefalsetruefalse18falsetruetrue00falsefalsefalsetruefalse19falsetruetrue00falsefalsefalsetruefalse20falsetruetrue00falsefalsefalsetruefalse21falsetruetrue00falsefalsefalsetruefalse22falsetruetrue00falsefalsefalsetruefalse23falsetruetrue00falsefalsefalsetruefalse24truetruetrue0.16210.1621falsefalsefalsetruefalse25truetruetrue0.09940.0994falsefalsefalsetruefalse26truetruetrue0.01410.0141falsefalsefalsetruefalse27falsetruetrue00falsefalsefalsetruefalse28truetruetrue0.01410.0141falsefalsefalsetruefalse29falsetruetrue00falsefalsefalsetruefalse30falsetruetrue00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalsefalseUSDfalsefalse$4falseColumnprimaryElement*6false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00falsefalsefalsetruefalse2falsetruetrue00&nbsp;[1]falsefalsefalsetruefalse3falsetruetrue00&nbsp;[1]falsefalsefalsetruefalse4truetruetrue0.15710.1571falsefalsefalsetruefalse5truetruetrue-0.0272-0.0272falsefalsefalsetruefalse6truetruetrue0.21480.2148falsefalsefalsetruefalse7falsetruetrue00falsefalsefalsetruefalse8falsetruetrue00&nbsp;[1]falsefalsefalsetruefalse9falsetruetrue00&nbsp;[1]falsefalsefalsetruefalse10falsetruetrue00falsefalsefalsetruefalse11truetruetrue0.10270.1027falsefalsefalsetruefalse12truetruetrue0.20470.2047falsefalsefalsetruefalse13falsetruetrue00falsefalsefalsetruefalse14falsetruetrue00&nbsp;[1]falsefalsefalsetruefalse15falsetruetrue00&nbsp;[1]falsefalsefalsetruefalse16truetruetrue0.24350.2435falsefalsefalsetruefalse17truetruetrue0.29980.2998falsefalsefalsetruefalse18truetruetrue0.32590.3259falsefalsefalsetruefalse19truetruetrue-0.0006-0.0006falsefalsefalsetruefalse20truetruetrue-0.0035-0.0035[1]falsefalsefalsetruefalse21truetruetrue-0.0021-0.0021[1]falsefalsefalsetruefalse22truetruetrue0.04040.0404falsefalsefalsetruefalse23truetruetrue0.03510.0351falsefalsefalsetruefalse24falsetruetrue00falsefalsefalsetruefalse25falsetruetrue00falsefalsefalsetruefalse26falsetruetrue00falsefalsefalsetruefalse27falsetruetrue00falsefalsefalsetruefalse28falsetruetrue00falsefalsefalsetruefalse29falsetruetrue00falsefalsefalsetruefalse30falsetruetrue00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalsefalseUSDfalsefalse$5falseColumnprimaryElement*7false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition 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Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024993Memberrr_ProspectusShareClassAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberEmerging Markets FundClass CBefore 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Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberEmerging Markets FundClass IBefore TaxesusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.28750.2875falsefalsefalsetruefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4truetruetrue-0.0272-0.0272falsefalsefalsetruefalse5falsetruefalse002007-12-312007-12-31falsefalsetruetruefalseOthernanafalsefalse6falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009198MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088110Memberrr_ProspectusShareClassAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberEmerging Markets FundClass YBefore TaxesusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4truetruetrue0.21480.2148falsefalsefalsetruefalse5falsetruefalse002010-05-012010-05-01falsefalsetruetruefalseOthernanafalsefalse7falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009198MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseEmerging Markets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009198Memberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberfalsefalseMSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_MSCI_Emerging_Markets_IndexMemberrr_PerformanceMeasureAxisexplicitMemberEmerging Markets FundShare ClassesMSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)Standard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.19200.1920falsefalsefalsetruefalse2truetruetrue0.13100.1310falsefalsefalsetruefalse3truetruetrue0.16210.1621falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalseOthernanafalsefalse1After 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. These returns are shown for one class of shares only; after tax-returns for the other classes may vary. Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-deferred account, such as a 401(k) plan or Investment Retirement Account.57Average Annual Total Returns Emerging Markets FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009198MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to PerformanceTableData.No authoritative reference available.falsefalse32false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturn1falsefalsefalse00Global Hard Assets FundGlobal Hard Assets Fundfalsefalsefalsefalsefalse2falsefalseUSDtruefalse{dei_LegalEntityAxis} : Global Hard Assets Fund 4/14/2011 - 4/14/2011 USD ($) $c9_S000009200Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalsecik0000768847_S000009200Memberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170ratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse34false0rr_RiskReturnHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00RISK/RETURNfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Investment Objectives/Goals Include the following information, in plain English under rule 421(d) under the Securities Act, in the order and subject matter indicatedReference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 falsefalse35false0rr_ObjectiveHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00INVESTMENT OBJECTIVEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse36false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Global Hard Assets Fund seeks long-term capital appreciation by investing primarily in hard asset securities. Income is a secondary consideration.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse37false0rr_ExpenseHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00FUND FEES AND EXPENSESfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Fee Table Includes the following information, in plain English under rule 421(d) under the Securities Act, after Item 2 Fees and expenses of the Fund This table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Shareholder Fees (fees paid directly from your investment) Example 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 you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be You would pay the following expenses if you did not redeem your shares The Example does not reflect sales charges (loads) on reinvested dividends [and other distributions]. If these sales charges (loads) were included, your costs would be higher. Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. 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 __% of the average value of its whole portfolio. Instructions. A.3.instructions.6 New Funds. For purposes of this Item, a "New Fund" is a Fund that does not include in Form N-1A financial statements reporting operating results or that includes financial statements for the Fund's initial fiscal year reporting operating results for a period of 6 months or less. The following Instructions apply to New Funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph d -Subsection instructions falsefalse38false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds. More information about these and other discounts is available from your financial professional and in the &#8220;Shareholder Information&#8221; section of the Fund&#8217;s prospectus and in the &#8220;Availability of Discounts&#8221; and &#8220;Breakpoint Linkage Rules for Discounts&#8221; sections of the Fund&#8217;s SAI.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse39false0rr_ShareholderFeesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Shareholder Fees (fees paid directly from your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subsection table falsefalse40false0rr_ShareholderFeesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact cik0000768847_S000009200Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact cik0000768847_S000009200Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsehttp://xbrl.sec.gov/rr/role/ShareholderFeesDatafalsefalse020010 - Schedule - Shareholder Feestruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009200MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024996Memberrr_ProspectusShareClassAxisexplicitMemberGlobal Hard Assets FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009200MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024997Memberrr_ProspectusShareClassAxisexplicitMemberGlobal Hard Assets FundClass CusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009200MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000033047Memberrr_ProspectusShareClassAxisexplicitMemberGlobal Hard Assets FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$4falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009200MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088112Memberrr_ProspectusShareClassAxisexplicitMemberGlobal Hard Assets FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.05750.0575falsefalsefalsetruefalse6truetruetrue0.00000.0000falsefalsefalsetruefalse7truetruetrue0.00000.0000falsefalsefalsetruefalse8truetruetrue0.00000.0000falsefalsefalsetruefalse9truetruetrue0.05750.0575falsefalsefalsetruefalse10truetruetrue0.00000.0000falsefalsefalsetruefalse11truetruetrue0.00000.0000falsefalsefalsetruefalse12truetruetrue0.00000.0000falsefalsefalsetruefalse13truetruetrue0.05750.0575falsefalsefalsetruefalse14truetruetrue0.00000.0000falsefalsefalsetruefalse15truetruetrue0.00000.0000falsefalsefalsetruefalse16truetruetrue0.05750.0575falsefalsefalsetruefalse17truetruetrue0.00000.0000falsefalsefalsetruefalse18truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*4false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.00000.0000falsefalsefalsetruefalse6truetruetrue0.01000.0100falsefalsefalsetruefalse7truetruetrue0.00000.0000falsefalsefalsetruefalse8truetruetrue0.00000.0000falsefalsefalsetruefalse9truetruetrue0.00000.0000falsefalsefalsetruefalse10truetruetrue0.01000.0100falsefalsefalsetruefalse11truetruetrue0.00000.0000falsefalsefalsetruefalse12truetruetrue0.00000.0000falsefalsefalsetruefalse13truetruetrue0.00000.0000falsefalsefalsetruefalse14truetruetrue0.00000.0000falsefalsefalsetruefalse15truetruetrue0.00000.0000falsefalsefalsetruefalse16truetruetrue0.00000.0000falsefalsefalsetruefalse17truetruetrue0.00000.0000falsefalsefalsetruefalse18truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse0rr_MaximumDeferredSalesChargeOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse42Shareholder Fees Global Hard Assets FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009200MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ShareholderFeesData.No authoritative reference available.falsefalse41false0rr_OperatingExpensesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 7 -Subsection table falsefalse42false0rr_AnnualFundOperatingExpensesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact cik0000768847_S000009200Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact cik0000768847_S000009200Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsehttp://xbrl.sec.gov/rr/role/OperatingExpensesDatafalsefalse020020 - Schedule - Annual Fund Operating Expensestruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009200MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024996Memberrr_ProspectusShareClassAxisexplicitMemberGlobal Hard Assets FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009200MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024997Memberrr_ProspectusShareClassAxisexplicitMemberGlobal Hard Assets FundClass CusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009200MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000033047Memberrr_ProspectusShareClassAxisexplicitMemberGlobal Hard Assets FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$4falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009200MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088112Memberrr_ProspectusShareClassAxisexplicitMemberGlobal Hard Assets FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00750.0075falsefalsefalsetruefalse2truetruetrue0.00750.0075falsefalsefalsetruefalse3truetruetrue0.00750.0075falsefalsefalsetruefalse4truetruetrue0.00750.0075falsefalsefalsetruefalse5truetruetrue0.00980.0098falsefalsefalsetruefalse6truetruetrue0.00980.0098falsefalsefalsetruefalse7truetruetrue0.00980.0098falsefalsefalsetruefalse8truetruetrue0.00980.0098falsefalsefalsetruefalse9truetruetrue0.00630.0063falsefalsefalsetruefalse10truetruetrue0.00630.0063falsefalsefalsetruefalse11truetruetrue0.00630.0063falsefalsefalsetruefalse12truetruetrue0.00630.0063falsefalsefalsetruefalse13truetruetrue0.01320.0132falsefalsefalsetruefalse14truetruetrue0.01320.0132falsefalsefalsetruefalse15truetruetrue0.01320.0132falsefalsefalsetruefalse16truetruetrue0.00750.0075falsefalsefalsetruefalse17truetruetrue0.00750.0075falsefalsefalsetruefalse18truetruetrue0.00750.0075falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse0rr_ManagementFeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00980.0098falsefalsefalsetruefalse2truetruetrue0.00980.0098falsefalsefalsetruefalse3truetruetrue0.00980.0098falsefalsefalsetruefalse4truetruetrue0.00980.0098falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*4false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.00250.0025falsefalsefalsetruefalse6truetruetrue0.01000.0100falsefalsefalsetruefalse7truetruetrue0.00000.0000falsefalsefalsetruefalse8truetruetrue0.00000.0000falsefalsefalsetruefalse9truetruetrue0.00250.0025falsefalsefalsetruefalse10truetruetrue0.01000.0100falsefalsefalsetruefalse11truetruetrue0.00000.0000falsefalsefalsetruefalse12truetruetrue0.00000.0000falsefalsefalsetruefalse13truetruetrue0.00250.0025falsefalsefalsetruefalse14truetruetrue0.00000.0000falsefalsefalsetruefalse15truetruetrue0.00000.0000falsefalsefalsetruefalse16truetruetrue0.00250.0025falsefalsefalsetruefalse17truetruetrue0.00000.0000falsefalsefalsetruefalse18truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse0rr_DistributionAndService12b1FeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse3falseRowprimaryElement*7false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00740.0074falsefalsefalsetruefalse2truetruetrue0.00860.0086falsefalsefalsetruefalse3truetruetrue0.01480.0148falsefalsefalsetruefalse4truetruetrue0.00980.0098falsefalsefalsetruefalse5truetruetrue0.00190.0019falsefalsefalsetruefalse6truetruetrue0.00170.0017falsefalsefalsetruefalse7truetruetrue0.00060.0006falsefalsefalsetruefalse8truetruetrue0.00110.0011falsefalsefalsetruefalse9truetruetrue0.00360.0036falsefalsefalsetruefalse10truetruetrue0.00310.0031falsefalsefalsetruefalse11truetruetrue0.00370.0037falsefalsefalsetruefalse12truetruetrue0.00470.0047falsefalsefalsetruefalse13falsetruetrue00falsefalsefalsetruefalse14falsetruetrue00falsefalsefalsetruefalse15falsetruetrue00falsefalsefalsetruefalse16truetruetrue0.00520.0052[1]falsefalsefalsetruefalse17truetruetrue0.00230.0023[1]falsefalsefalsetruefalse18truetruetrue0.00520.0052[1]falsefalsefalsetruefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse0rr_OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00190.0019falsefalsefalsetruefalse2truetruetrue0.00170.0017falsefalsefalsetruefalse3truetruetrue0.00060.0006falsefalsefalsetruefalse4truetruetrue0.00110.0011falsefalsefalsetruefalseOthernanafalsefalse4falseRowprimaryElement*8false0rr_AcquiredFundFeesAndExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00falsefalsefalsetruefalse2falsetruetrue00falsefalsefalsetruefalse3falsetruetrue00falsefalsefalsetruefalse4falsetruetrue00falsefalsefalsetruefalse5truetruetrue0.00010.0001falsefalsefalsetruefalse6truetruetrue0.00010.0001falsefalsefalsetruefalse7truetruetrue0.00010.0001falsefalsefalsetruefalse8truetruetrue0.00010.0001falsefalsefalsetruefalse9truetruetrue0.00010.0001falsefalsefalsetruefalse10truetruetrue0.00010.0001falsefalsefalsetruefalse11truetruetrue0.00010.0001falsefalsefalsetruefalse12truetruetrue0.00010.0001falsefalsefalsetruefalse13truetruetrue0.00780.0078falsefalsefalsetruefalse14truetruetrue0.00780.0078falsefalsefalsetruefalse15truetruetrue0.00780.0078falsefalsefalsetruefalse16falsetruetrue00falsefalsefalsetruefalse17falsetruetrue00falsefalsefalsetruefalse18falsetruetrue00falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse0rr_AcquiredFundFeesAndExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00010.0001falsefalsefalsetruefalse2truetruetrue0.00010.0001falsefalsefalsetruefalse3truetruetrue0.00010.0001falsefalsefalsetruefalse4truetruetrue0.00010.0001falsefalsefalsetruefalseOthernanafalsefalse5falseRowprimaryElement*9false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01740.0174falsefalsefalsetruefalse2truetruetrue0.02610.0261falsefalsefalsetruefalse3truetruetrue0.02230.0223falsefalsefalsetruefalse4truetruetrue0.01730.0173falsefalsefalsetruefalse5truetruetrue0.01430.0143falsefalsefalsetruefalse6truetruetrue0.02160.0216falsefalsefalsetruefalse7truetruetrue0.01050.0105falsefalsefalsetruefalse8truetruetrue0.01100.0110falsefalsefalsetruefalse9truetruetrue0.01250.0125falsefalsefalsetruefalse10truetruetrue0.01950.0195falsefalsefalsetruefalse11truetruetrue0.01010.0101falsefalsefalsetruefalse12truetruetrue0.01110.0111falsefalsefalsetruefalse13truetruetrue0.03370.0337falsefalsefalsetruefalse14truetruetrue0.03130.0313falsefalsefalsetruefalse15truetruetrue0.03060.0306falsefalsefalsetruefalse16truetruetrue0.01520.0152falsefalsefalsetruefalse17truetruetrue0.00980.0098falsefalsefalsetruefalse18truetruetrue0.01270.0127falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse0rr_ExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01430.0143falsefalsefalsetruefalse2truetruetrue0.02160.0216falsefalsefalsetruefalse3truetruetrue0.01050.0105falsefalsefalsetruefalse4truetruetrue0.01100.0110falsefalsefalsetruefalseOthernanafalsefalse6falseRowprimaryElement*10false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000[4]falsefalsefalsetruefalse2truetruetrue-0.0011-0.0011[4]falsefalsefalsetruefalse3truetruetrue-0.0098-0.0098[4]falsefalsefalsetruefalse4truetruetrue-0.0003-0.0003[4]falsefalsefalsetruefalse5truetruetrue-0.0004-0.0004[3]falsefalsefalsetruefalse6truetruetrue0.00000.0000[3]falsefalsefalsetruefalse7truetruetrue-0.0004-0.0004[3]falsefalsefalsetruefalse8truetruetrue0.00000.0000[3]falsefalsefalsetruefalse9falsetruetrue00falsefalsefalsetruefalse10falsetruetrue00falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.00000.0000[5]falsefalsefalsetruefalse14truetruetrue-0.0013-0.0013[5]falsefalsefalsetruefalse15truetruetrue0.00000.0000[5]falsefalsefalsetruefalse16truetruetrue-0.0057-0.0057[2]falsefalsefalsetruefalse17truetruetrue-0.0033-0.0033[2]falsefalsefalsetruefalse18truetruetrue-0.0057-0.0057[2]falsefalsefalsetruefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse0rr_FeeWaiverOrReimbursementOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1truetruetrue-0.0004-0.0004falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue-0.0004-0.0004falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse7falseRowprimaryElement*11false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01740.0174falsefalsefalsetruefalse2truetruetrue0.02500.0250falsefalsefalsetruefalse3truetruetrue0.01250.0125falsefalsefalsetruefalse4truetruetrue0.01700.0170falsefalsefalsetruefalse5truetruetrue0.01390.0139falsefalsefalsetruefalse6truetruetrue0.02160.0216falsefalsefalsetruefalse7truetruetrue0.01010.0101falsefalsefalsetruefalse8truetruetrue0.01100.0110falsefalsefalsetruefalse9falsetruetrue00falsefalsefalsetruefalse10falsetruetrue00falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.03370.0337falsefalsefalsetruefalse14truetruetrue0.03000.0300falsefalsefalsetruefalse15truetruetrue0.03060.0306falsefalsefalsetruefalse16truetruetrue0.00950.0095falsefalsefalsetruefalse17truetruetrue0.00650.0065falsefalsefalsetruefalse18truetruetrue0.00700.0070falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse0rr_NetExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01390.0139falsefalsefalsetruefalse2truetruetrue0.02160.0216falsefalsefalsetruefalse3truetruetrue0.01010.0101falsefalsefalsetruefalse4truetruetrue0.01100.0110falsefalsefalsetruefalseOthernanafalsefalse1Van Eck Associates Corporation (the "Adviser") has agreed to waive fees and/or pay Fund expenses to the extent necessary to prevent the operating expenses of the Fund (excluding acquired fund fees and expenses, interest expense, trading expenses, dividends on securities sold short, taxes and extraordinary expenses) from exceeding 1.38% for Class A, 2.20% for Class C, 1.00% for Class I, and 1.13% for Class Y of the Fund's average daily net assets per year until May 1, 2012. During such time, the expense limitation is expected to continue until the Board of Trustees acts to discontinue all or a portion of such expense limitation.47Annual Fund Operating Expenses Global Hard Assets FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009200MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to OperatingExpensesData.No authoritative reference available.falsefalse43false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Expense ExamplefalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse44false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following 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 either redeem all of your shares at the end of these periods or continue to hold them. The example also assumes that your investment has a 5% return each year and that the Fund&#8217;s operating expenses remain the same. Although your actual expenses may be higher or lower, based on these assumptions, your costs would be:</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThe Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection example falsefalse45false0rr_ExpenseExampleByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00SoldfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse46false0rr_ExpenseExampleWithRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact cik0000768847_S000009200Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact cik0000768847_S000009200Member column rr_ProspectusShareClassAxis compact * row primary compact * ~truehttp://xbrl.sec.gov/rr/role/ExpenseExamplefalsefalse020030 - Schedule - Expense Example {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue742742falsefalsefalsetruefalse2truefalsetrue353353falsefalsefalsetruefalse3truefalsetrue127127falsefalsefalsetruefalse4truefalsetrue173173falsefalsefalsetruefalse5truefalsetrue708708falsefalsefalsetruefalse6truefalsetrue319319falsefalsefalsetruefalse7truefalsetrue103103falsefalsefalsetruefalse8truefalsetrue112112falsefalsefalsetruefalse9truefalsetrue695695falsefalsefalsetruefalse10truefalsetrue298298falsefalsefalsetruefalse11truefalsetrue103103falsefalsefalsetruefalse12truefalsetrue113113falsefalsefalsetruefalse13truefalsetrue340340falsefalsefalsetruefalse14truefalsetrue303303falsefalsefalsetruefalse15truefalsetrue309309falsefalsefalsetruefalse16truefalsetrue666666falsefalsefalsetruefalse17truefalsetrue6666falsefalsefalsetruefalse18truefalsetrue7272falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalsefalseUSDfalsefalse$2falseColumnprimaryElement*4false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue10911091falsefalsefalsetruefalse2truefalsetrue801801falsefalsefalsetruefalse3truefalsetrue603603falsefalsefalsetruefalse4truefalsetrue542542falsefalsefalsetruefalse5truefalsetrue998998falsefalsefalsetruefalse6truefalsetrue676676falsefalsefalsetruefalse7truefalsetrue330330falsefalsefalsetruefalse8truefalsetrue350350falsefalsefalsetruefalse9truefalsetrue949949falsefalsefalsetruefalse10truefalsetrue612612falsefalsefalsetruefalse11truefalsetrue322322falsefalsefalsetruefalse12truefalsetrue353353falsefalsefalsetruefalse13truefalsetrue10361036falsefalsefalsetruefalse14truefalsetrue954954falsefalsefalsetruefalse15truefalsetrue945945falsefalsefalsetruefalse16truefalsetrue975975falsefalsefalsetruefalse17truefalsetrue279279falsefalsefalsetruefalse18truefalsetrue346346falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalseUSDfalsefalse$3falseColumnprimaryElement*5false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue14641464falsefalsefalsetruefalse2truefalsetrue13751375falsefalsefalsetruefalse3truefalsetrue11051105falsefalsefalsetruefalse4truefalsetrue936936falsefalsefalsetruefalse5truefalsetrue13081308falsefalsefalsetruefalse6truefalsetrue11591159falsefalsefalsetruefalse7truefalsetrue575575falsefalsefalsetruefalse8truefalsetrue606606falsefalsefalsetruefalse9truefalsetrue12221222falsefalsefalsetruefalse10truefalsetrue10521052falsefalsefalsetruefalse11truefalsetrue558558falsefalsefalsetruefalse12truefalsetrue612612falsefalsefalsetruefalse13truefalsetrue17551755falsefalsefalsetruefalse14truefalsetrue16291629falsefalsefalsetruefalse15truefalsetrue16061606falsefalsefalsetruefalse16falsefalsetrue00falsefalsefalsetruefalse17falsefalsetrue00falsefalsefalsetruefalse18falsefalsetrue00falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalseUSDfalsefalse$4falseColumnprimaryElement*6false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue25092509falsefalsefalsetruefalse2truefalsetrue29362936falsefalsefalsetruefalse3truefalsetrue24882488falsefalsefalsetruefalse4truefalsetrue20382038falsefalsefalsetruefalse5truefalsetrue21862186falsefalsefalsetruefalse6truefalsetrue24932493falsefalsefalsetruefalse7truefalsetrue12791279falsefalsefalsetruefalse8truefalsetrue13401340falsefalsefalsetruefalse9truefalsetrue19991999falsefalsefalsetruefalse10truefalsetrue22752275falsefalsefalsetruefalse11truefalsetrue12361236falsefalsefalsetruefalse12truefalsetrue13521352falsefalsefalsetruefalse13truefalsetrue36583658falsefalsefalsetruefalse14truefalsetrue34303430falsefalsefalsetruefalse15truefalsetrue33743374falsefalsefalsetruefalse16falsefalsetrue00falsefalsefalsetruefalse17falsefalsetrue00falsefalsefalsetruefalse18falsefalsetrue00falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009200MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024996Memberrr_ProspectusShareClassAxisexplicitMemberGlobal Hard Assets FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue708708falsefalsefalsetruefalse2truefalsetrue998998falsefalsefalsetruefalse3truefalsetrue13081308falsefalsefalsetruefalse4truefalsetrue21862186falsefalsefalsetruefalseOthernanafalsefalse2falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009200MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024997Memberrr_ProspectusShareClassAxisexplicitMemberGlobal Hard Assets FundClass CusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue319319falsefalsefalsetruefalse2truefalsetrue676676falsefalsefalsetruefalse3truefalsetrue11591159falsefalsefalsetruefalse4truefalsetrue24932493falsefalsefalsetruefalseOthernanafalsefalse3falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009200MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000033047Memberrr_ProspectusShareClassAxisexplicitMemberGlobal Hard Assets FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue103103falsefalsefalsetruefalse2truefalsetrue330330falsefalsefalsetruefalse3truefalsetrue575575falsefalsefalsetruefalse4truefalsetrue12791279falsefalsefalsetruefalseOthernanafalsefalse4falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009200MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088112Memberrr_ProspectusShareClassAxisexplicitMemberGlobal Hard Assets FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue112112falsefalsefalsetruefalse2truefalsetrue350350falsefalsefalsetruefalse3truefalsetrue606606falsefalsefalsetruefalse4truefalsetrue13401340falsefalsefalsetruefalseOthernanafalsefalse44Expense Example Global Hard Assets Fund (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009200MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExample.No authoritative reference available.falsefalse47false0rr_ExpenseExampleNoRedemptionByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00HeldfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse48false0rr_ExpenseExampleNoRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption column dei_LegalEntityAxis compact cik0000768847_S000009200Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption column dei_LegalEntityAxis compact cik0000768847_S000009200Member column rr_ProspectusShareClassAxis compact * row primary compact * ~truehttp://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemptionfalsefalse020040 - Schedule - Expense Example, No Redemption {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue742742falsefalsefalsetruefalse2truefalsetrue253253falsefalsefalsetruefalse3truefalsetrue127127falsefalsefalsetruefalse4truefalsetrue173173falsefalsefalsetruefalse5truefalsetrue708708falsefalsefalsetruefalse6truefalsetrue219219falsefalsefalsetruefalse7truefalsetrue103103falsefalsefalsetruefalse8truefalsetrue112112falsefalsefalsetruefalse9truefalsetrue695695falsefalsefalsetruefalse10truefalsetrue198198falsefalsefalsetruefalse11truefalsetrue103103falsefalsefalsetruefalse12truefalsetrue113113falsefalsefalsetruefalse13truefalsetrue340340falsefalsefalsetruefalse14truefalsetrue303303falsefalsefalsetruefalse15truefalsetrue309309falsefalsefalsetruefalse16truefalsetrue666666falsefalsefalsetruefalse17truefalsetrue6666falsefalsefalsetruefalse18truefalsetrue7272falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalsefalseUSDfalsefalse$2falseColumnprimaryElement*4false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue10911091falsefalsefalsetruefalse2truefalsetrue801801falsefalsefalsetruefalse3truefalsetrue603603falsefalsefalsetruefalse4truefalsetrue542542falsefalsefalsetruefalse5truefalsetrue998998falsefalsefalsetruefalse6truefalsetrue676676falsefalsefalsetruefalse7truefalsetrue330330falsefalsefalsetruefalse8truefalsetrue350350falsefalsefalsetruefalse9truefalsetrue949949falsefalsefalsetruefalse10truefalsetrue612612falsefalsefalsetruefalse11truefalsetrue322322falsefalsefalsetruefalse12truefalsetrue353353falsefalsefalsetruefalse13truefalsetrue10361036falsefalsefalsetruefalse14truefalsetrue954954falsefalsefalsetruefalse15truefalsetrue945945falsefalsefalsetruefalse16truefalsetrue975975falsefalsefalsetruefalse17truefalsetrue279279falsefalsefalsetruefalse18truefalsetrue346346falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalsefalseUSDfalsefalse$3falseColumnprimaryElement*5false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue14641464falsefalsefalsetruefalse2truefalsetrue13751375falsefalsefalsetruefalse3truefalsetrue11051105falsefalsefalsetruefalse4truefalsetrue936936falsefalsefalsetruefalse5truefalsetrue13081308falsefalsefalsetruefalse6truefalsetrue11591159falsefalsefalsetruefalse7truefalsetrue575575falsefalsefalsetruefalse8truefalsetrue606606falsefalsefalsetruefalse9truefalsetrue12221222falsefalsefalsetruefalse10truefalsetrue10521052falsefalsefalsetruefalse11truefalsetrue558558falsefalsefalsetruefalse12truefalsetrue612612falsefalsefalsetruefalse13truefalsetrue17551755falsefalsefalsetruefalse14truefalsetrue16291629falsefalsefalsetruefalse15truefalsetrue16061606falsefalsefalsetruefalse16falsefalsetrue00falsefalsefalsetruefalse17falsefalsetrue00falsefalsefalsetruefalse18falsefalsetrue00falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalsefalseUSDfalsefalse$4falseColumnprimaryElement*6false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue25092509falsefalsefalsetruefalse2truefalsetrue29362936falsefalsefalsetruefalse3truefalsetrue24882488falsefalsefalsetruefalse4truefalsetrue20382038falsefalsefalsetruefalse5truefalsetrue21862186falsefalsefalsetruefalse6truefalsetrue24932493falsefalsefalsetruefalse7truefalsetrue12791279falsefalsefalsetruefalse8truefalsetrue13401340falsefalsefalsetruefalse9truefalsetrue19991999falsefalsefalsetruefalse10truefalsetrue22752275falsefalsefalsetruefalse11truefalsetrue12361236falsefalsefalsetruefalse12truefalsetrue13521352falsefalsefalsetruefalse13truefalsetrue36583658falsefalsefalsetruefalse14truefalsetrue34303430falsefalsefalsetruefalse15truefalsetrue33743374falsefalsefalsetruefalse16falsefalsetrue00falsefalsefalsetruefalse17falsefalsetrue00falsefalsefalsetruefalse18falsefalsetrue00falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalsefalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009200MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024996Memberrr_ProspectusShareClassAxisexplicitMemberGlobal Hard Assets FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue708708falsefalsefalsetruefalse2truefalsetrue998998falsefalsefalsetruefalse3truefalsetrue13081308falsefalsefalsetruefalse4truefalsetrue21862186falsefalsefalsetruefalseOthernanafalsefalse2falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009200MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024997Memberrr_ProspectusShareClassAxisexplicitMemberGlobal Hard Assets FundClass CusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue219219falsefalsefalsetruefalse2truefalsetrue676676falsefalsefalsetruefalse3truefalsetrue11591159falsefalsefalsetruefalse4truefalsetrue24932493falsefalsefalsetruefalseOthernanafalsefalse3falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009200MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000033047Memberrr_ProspectusShareClassAxisexplicitMemberGlobal Hard Assets FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue103103falsefalsefalsetruefalse2truefalsetrue330330falsefalsefalsetruefalse3truefalsetrue575575falsefalsefalsetruefalse4truefalsetrue12791279falsefalsefalsetruefalseOthernanafalsefalse4falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009200MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088112Memberrr_ProspectusShareClassAxisexplicitMemberGlobal Hard Assets FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue112112falsefalsefalsetruefalse2truefalsetrue350350falsefalsefalsetruefalse3truefalsetrue606606falsefalsefalsetruefalse4truefalsetrue13401340falsefalsefalsetruefalseOthernanafalsefalse44Expense Example, No Redemption Global Hard Assets Fund (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009200MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExampleNoRedemption.No authoritative reference available.falsefalse49false0rr_PortfolioTurnoverHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PORTFOLIO TURNOVERfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 5 -Subsection instructions falsefalse50false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 66% of the average value of its portfolio.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalse51false0rr_StrategyHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL INVESTMENT STRATEGIESfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse52false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Under normal conditions, the Fund invests at least 80% of its net assets in securities of &#8220;hard asset&#8221; companies and instruments that derive their value from &#8220;hard assets&#8221;. Hard assets include precious metals (including gold), base and industrial metals, energy, natural resources and other commodities. A hard assets company is a company that derives, directly or indirectly, at least 50% of its revenues from exploration, development, production, distribution or facilitation of processes relating to hard assets. The Fund concentrates its investments in the securities of hard assets companies and instruments that derive their value from hard assets. The Fund is considered to be &#8220;non-diversified&#8221; which means that it may invest in fewer securities than a &#8220;diversified&#8221; fund.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may invest without limitation in any one hard asset sector and is not required to invest any portion of its assets in any one hard asset sector. The Fund may invest in securities of companies located anywhere in the world, including the U.S. Under ordinary circumstances, the Fund will invest in securities of issuers from a number of different countries, and may invest any amount of its assets in emerging markets. The Fund may invest in securities of companies of any capitalization range. Utilizing qualitative and quantitative measures, the Fund&#8217;s investment management team selects equity securities of companies that it believes represent value opportunities and/or that have growth potential. Candidates for the Fund&#8217;s portfolio are evaluated based on their relative desirability using a wide range of criteria and are regularly reviewed to ensure that they continue to offer absolute and relative desirability.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may use derivative instruments, such as structured notes, futures, options and swap agreements, to gain or hedge exposure to hard assets, hard asset companies and other assets. The Fund may enter into foreign currency transactions to attempt to moderate the effect of currency fluctuations. The Fund may write covered call options on portfolio securities to the extent that the value of all securities with respect to which covered calls are written does not exceed 10% of the Fund&#8217;s net asset value. The Fund may also invest up to 20% of its net assets in securities issued by other investment companies, including exchange-traded funds (&#8220;ETFs&#8221;). The Fund may also invest in money market funds, but these investments are not subject to this limitation. The Fund may invest in ETFs to participate in, or gain rapid exposure to, certain market sectors, or when direct investments in certain countries are not permitted.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse53false0rr_RiskHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL RISKSfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subsection b falsefalse54false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">There is no assurance that the Fund will achieve its investment objective. The Fund&#8217;s share price and return will fluctuate with changes in the market value of the Fund&#8217;s portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Commodities and Commodity-Linked Derivatives.</b> Exposure to the commodities markets, such as precious metals, industrial metals, gas and other energy products and natural resources, may subject a Fund to greater volatility than investments in traditional securities. The commodities markets may fluctuate widely based on a variety of factors including changes in overall market movements, political and economic events and policies, war, acts of terrorism and changes in interest rates or inflation rates. Because the value of a commodity-linked derivative instrument and structured note typically are based upon the price movements of physical commodities, the value of these securities will rise or fall in response to changes in the underlying commodities or related index of investment.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Derivatives.</b> The use of derivatives, such as swap agreements, options, warrants, futures contracts, currency forwards and structured notes, presents risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. The use of derivatives can lead to losses because of adverse movements in the price or value of the underlying security, asset, index or reference rate. Derivative strategies often involve leverage, which may exaggerate a loss, potentially causing a Fund to lose more money than it would have lost had it invested in the underlying security. Also, a liquid secondary market may not always exist for the Fund&#8217;s derivative positions at times when the Fund might wish to terminate or sell such positions and over the counter instruments may be illiquid.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Direct Investments.</b> Direct investments may involve a high degree of business and financial risk that can result in substantial losses. Because of the absence of any public trading market for these investments, a Fund may take longer to liquidate these positions than would be the case for publicly traded securities. Direct investments are generally considered illiquid and will be aggregated with other illiquid investments for purposes of the limitation on illiquid investments.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Emerging Markets Securities.</b> Emerging markets securities typically present even greater exposure to the risks described under &#8220;Foreign Securities&#8221; and may be particularly sensitive to certain economic changes. Emerging markets securities are exposed to a number of risks that may make these investments volatile in price or difficult to trade.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Foreign Currency Transactions.</b> An investment transacted in a foreign currency may lose value due to fluctuations in the rate of exchange. These fluctuations can make the return on an investment go up or down, entirely apart from the quality or performance of the investment itself.</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Foreign Securities.</b> Foreign investments are subject to greater risks than U.S. domestic investments. These additional risks may include exchange rate fluctuations and exchange controls; less publicly available information; more volatile or less liquid securities markets; and the possibility of arbitrary action by foreign governments, or political, economic or social instability. Foreign companies also may be subject to significantly higher levels of taxation than U.S. companies, including potentially confiscatory levels of taxation, thereby reducing the earnings potential of such foreign companies.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Hard Assets Sectors.</b> The Fund may be subject to greater risks and market fluctuations than a fund whose portfolio has exposure to a broader range of sectors. The Fund may be susceptible to financial, economic, political or market events, as well as government regulation, impacting the hard assets sectors (such as the energy, metals and real estate sectors). Precious metals and natural resources securities are at times volatile and there may be sharp fluctuations in prices, even during periods of rising prices.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Investments in Other Investment Companies.</b> A Fund&#8217;s investment in another investment company may subject the Fund indirectly to the underlying risks of the investment company. The Fund also will bear its share of the underlying investment company&#8217;s fees and expenses, which are in addition to the Fund&#8217;s own fees and expenses.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Market.</b> Market risk refers to the risk that the market prices of securities that a Fund holds will rise or fall, sometimes rapidly or unpredictably. In general, equity securities tend to have greater price volatility than debt securities.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Non-Diversification.</b> A non-diversified fund&#8217;s greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund&#8217;s portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Small- and Medium-Capitalization Companies.</b> Securities of small- and medium-sized companies often have greater price volatility, lower trading volume and less liquidity than larger more established companies. The stocks of small<i>-</i> and medium-sized companies may have returns that vary, sometimes significantly, from the overall stock market.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringNarrative Risk Disclosure. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Clause instruction -Subsection b falsefalse55false0rr_BarChartAndPerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PERFORMANCEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse56false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund&#8217;s performance from year to year and by showing how the Fund&#8217;s average annual total returns compare with those of a broad measure of market performance and one or more other performance measures. For instance, the S&amp;P North American Natural Resources Sector Index includes mining, energy, paper and forest products, and plantation-owning companies. The Fund&#8217;s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. The annual returns in the bar chart are for the Fund&#8217;s Class&#160;A shares and do not reflect sales loads. If sales loads were reflected, returns would be less than those shown.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Additionally, large purchases and/or redemptions of shares of a class, relative to the amount of assets represented by the class, may cause the annual returns for each class to differ. Updated performance information for the Fund is available on the Van Eck website at vaneck.com.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse57false0rr_BarChartNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p align="center"><font style="font-family:sans-serif; font-size:3.5mm;"></font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringProvide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph i -Subsection b falsefalse58false0rr_BarChartHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00CLASS A: Annual Total Returns (%) as of 12/31falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse59false0rr_BarChartTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact cik0000768847_S000009200Member column rr_ProspectusShareClassAxis compact cik0000768847_C000024996Member row primary compact * ~falsefalseBarChart2.jpg~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact cik0000768847_S000009200Member column rr_ProspectusShareClassAxis compact cik0000768847_C000024996Member row primary compact * ~falsehttp://xbrl.sec.gov/rr/role/BarChartDatafalsefalse020050 - Schedule - Annual Total Returnstruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009200MemberColumnrr_ProspectusShareClassAxisAxiscik0000768847_C000024996MemberColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024996Memberrr_ProspectusShareClassAxisexplicitMemberGlobal Hard Assets FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_AnnualReturn2001rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.2732-0.2732falsefalsefalsetruefalse2truetruefalse-0.0856-0.0856falsefalsefalsetruefalse3truetruefalse0.20740.2074falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. 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Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse0rr_AnnualReturn2002truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.06770.0677falsefalsefalsetruefalseOthernanafalsefalse3falseRowprimaryElement*5false0rr_AnnualReturn2003rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.75050.7505falsefalsefalsetruefalse2truetruefalse0.42440.4244falsefalsefalsetruefalse3truetruefalse0.44250.4425falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse0rr_AnnualReturn2003truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.42440.4244falsefalsefalsetruefalseOthernanafalsefalse4falseRowprimaryElement*6false0rr_AnnualReturn2004rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.19790.1979falsefalsefalsetruefalse2truetruefalse0.22870.2287falsefalsefalsetruefalse3truetruefalse-0.0773-0.0773falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse0rr_AnnualReturn2004truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.22870.2287falsefalsefalsetruefalseOthernanafalsefalse5falseRowprimaryElement*7false0rr_AnnualReturn2005rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.29770.2977falsefalsefalsetruefalse2truetruefalse0.48720.4872falsefalsefalsetruefalse3truetruefalse0.35620.3562falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse0rr_AnnualReturn2005truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.48720.4872falsefalsefalsetruefalseOthernanafalsefalse6falseRowprimaryElement*8false0rr_AnnualReturn2006rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.38980.3898falsefalsefalsetruefalse2truetruefalse0.22860.2286falsefalsefalsetruefalse3truetruefalse0.45230.4523falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse0rr_AnnualReturn2006truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.22860.2286falsefalsefalsetruefalseOthernanafalsefalse7falseRowprimaryElement*9false0rr_AnnualReturn2007rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.35660.3566falsefalsefalsetruefalse2truetruefalse0.42620.4262falsefalsefalsetruefalse3truetruefalse0.27410.2741falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse0rr_AnnualReturn2007truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.42620.4262falsefalsefalsetruefalseOthernanafalsefalse8falseRowprimaryElement*10false0rr_AnnualReturn2008rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.6812-0.6812falsefalsefalsetruefalse2truetruefalse-0.4468-0.4468falsefalsefalsetruefalse3truetruefalse-0.2903-0.2903falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. 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Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse0rr_AnnualReturn2009truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.52460.5246falsefalsefalsetruefalseOthernanafalsefalse10falseRowprimaryElement*12false0rr_AnnualReturn2010rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.28170.2817falsefalsefalsetruefalse2truetruefalse0.28430.2843falsefalsefalsetruefalse3truetruefalse0.50990.5099falsefalsefalsetruefalse4truetruefalse0.04560.0456falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. 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Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse61false0rr_AverageAnnualReturnCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Average Annual Total Returns as of 12/31/10falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 5 -Subsection b falsefalse62false0rr_PerformanceTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact cik0000768847_S000009200Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact cik0000768847_S000009200Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~truehttp://xbrl.sec.gov/rr/role/PerformanceTableDatafalsefalse020060 - Schedule - Average Annual Total Returns {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.20830.2083falsefalsefalsetruefalse2truetruetrue0.20720.2072[1]falsefalsefalsetruefalse3truetruetrue0.13540.1354[1]falsefalsefalsetruefalse4truetruetrue0.26160.2616falsefalsefalsetruefalse5truetruetrue0.28750.2875falsefalsefalsetruefalse6falsetruetrue00falsefalsefalsetruefalse7truetruetrue0.21040.2104falsefalsefalsetruefalse8truetruetrue0.20860.2086[1]falsefalsefalsetruefalse9truetruetrue0.13670.1367[1]falsefalsefalsetruefalse10truetruetrue0.26440.2644falsefalsefalsetruefalse11truetruetrue0.28930.2893falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.42340.4234falsefalsefalsetruefalse14truetruetrue0.37130.3713[1]falsefalsefalsetruefalse15truetruetrue0.28940.2894[1]falsefalsefalsetruefalse16truetruetrue0.48890.4889falsefalsefalsetruefalse17truetruetrue0.51470.5147falsefalsefalsetruefalse18falsetruetrue00falsefalsefalsetruefalse19truetruetrue-0.0146-0.0146falsefalsefalsetruefalse20truetruetrue-0.0190-0.0190[1]falsefalsefalsetruefalse21truetruetrue-0.0094-0.0094[1]falsefalsefalsetruefalse22truetruetrue0.04890.0489falsefalsefalsetruefalse23falsetruetrue00falsefalsefalsetruefalse24truetruetrue0.19200.1920falsefalsefalsetruefalse25truetruetrue0.23880.2388falsefalsefalsetruefalse26truetruetrue0.15060.1506falsefalsefalsetruefalse27truetruetrue0.34750.3475falsefalsefalsetruefalse28truetruetrue0.15060.1506falsefalsefalsetruefalse29truetruetrue0.05190.0519falsefalsefalsetruefalse30truetruetrue0.15060.1506falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn 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available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.09850.0985falsefalsefalsetruefalse2truetruetrue0.08460.0846[1]falsefalsefalsetruefalse3truetruetrue0.07980.0798[1]falsefalsefalsetruefalse4truetruetrue0.10360.1036falsefalsefalsetruefalse5falsetruetrue00falsefalsefalsetruefalse6falsetruetrue00falsefalsefalsetruefalse7truetruetrue0.12330.1233falsefalsefalsetruefalse8truetruetrue0.11440.1144[1]falsefalsefalsetruefalse9truetruetrue0.10420.1042[1]falsefalsefalsetruefalse10truetruetrue0.12810.1281falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.25080.2508falsefalsefalsetruefalse14truetruetrue0.22070.2207[1]falsefalsefalsetruefalse15truetruetrue0.20560.2056[1]falsefalsefalsetruefalse16truetruetrue0.25650.2565falsefalsefalsetruefalse17falsetruetrue00falsefalsefalsetruefalse18falsetruetrue00falsefalsefalsetruefalse19falsetruetrue00falsefalsefalsetruefalse20falsetruetrue00falsefalsefalsetruefalse21falsetruetrue00falsefalsefalsetruefalse22falsetruetrue00falsefalsefalsetruefalse23falsetruetrue00falsefalsefalsetruefalse24truetruetrue0.13100.1310falsefalsefalsetruefalse25truetruetrue0.08980.0898falsefalsefalsetruefalse26truetruetrue0.02290.0229falsefalsefalsetruefalse27truetruetrue0.14650.1465falsefalsefalsetruefalse28truetruetrue0.02290.0229falsefalsefalsetruefalse29falsetruetrue00falsefalsefalsetruefalse30falsetruetrue00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalsefalseUSDfalsefalse$3falseColumnprimaryElement*5false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.09020.0902falsefalsefalsetruefalse2truetruetrue0.07910.0791[1]falsefalsefalsetruefalse3truetruetrue0.07480.0748[1]falsefalsefalsetruefalse4falsetruetrue00falsefalsefalsetruefalse5falsetruetrue00falsefalsefalsetruefalse6falsetruetrue00falsefalsefalsetruefalse7truetruetrue0.16350.1635falsefalsefalsetruefalse8truetruetrue0.15890.1589[1]falsefalsefalsetruefalse9truetruetrue0.14690.1469[1]falsefalsefalsetruefalse10truetruetrue0.16170.1617falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.28950.2895falsefalsefalsetruefalse14truetruetrue0.26260.2626[1]falsefalsefalsetruefalse15truetruetrue0.25070.2507[1]falsefalsefalsetruefalse16falsetruetrue00falsefalsefalsetruefalse17falsetruetrue00falsefalsefalsetruefalse18falsetruetrue00falsefalsefalsetruefalse19falsetruetrue00falsefalsefalsetruefalse20falsetruetrue00falsefalsefalsetruefalse21falsetruetrue00falsefalsefalsetruefalse22falsetruetrue00falsefalsefalsetruefalse23falsetruetrue00falsefalsefalsetruefalse24truetruetrue0.16210.1621falsefalsefalsetruefalse25truetruetrue0.09940.0994falsefalsefalsetruefalse26truetruetrue0.01410.0141falsefalsefalsetruefalse27falsetruetrue00falsefalsefalsetruefalse28truetruetrue0.01410.0141falsefalsefalsetruefalse29falsetruetrue00falsefalsefalsetruefalse30falsetruetrue00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn 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available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00falsefalsefalsetruefalse2falsetruetrue00&nbsp;[1]falsefalsefalsetruefalse3falsetruetrue00&nbsp;[1]falsefalsefalsetruefalse4truetruetrue0.15710.1571falsefalsefalsetruefalse5truetruetrue-0.0272-0.0272falsefalsefalsetruefalse6truetruetrue0.21480.2148falsefalsefalsetruefalse7falsetruetrue00falsefalsefalsetruefalse8falsetruetrue00&nbsp;[1]falsefalsefalsetruefalse9falsetruetrue00&nbsp;[1]falsefalsefalsetruefalse10falsetruetrue00falsefalsefalsetruefalse11truetruetrue0.10270.1027falsefalsefalsetruefalse12truetruetrue0.20470.2047falsefalsefalsetruefalse13falsetruetrue00falsefalsefalsetruefalse14falsetruetrue00&nbsp;[1]falsefalsefalsetruefalse15falsetruetrue00&nbsp;[1]falsefalsefalsetruefalse16truetruetrue0.24350.2435falsefalsefalsetruefalse17truetruetrue0.29980.2998falsefalsefalsetruefalse18truetruetrue0.32590.3259falsefalsefalsetruefalse19truetruetrue-0.0006-0.0006falsefalsefalsetruefalse20truetruetrue-0.0035-0.0035[1]falsefalsefalsetruefalse21truetruetrue-0.0021-0.0021[1]falsefalsefalsetruefalse22truetruetrue0.04040.0404falsefalsefalsetruefalse23truetruetrue0.03510.0351falsefalsefalsetruefalse24falsetruetrue00falsefalsefalsetruefalse25falsetruetrue00falsefalsefalsetruefalse26falsetruetrue00falsefalsefalsetruefalse27falsetruetrue00falsefalsefalsetruefalse28falsetruetrue00falsefalsefalsetruefalse29falsetruetrue00falsefalsefalsetruefalse30falsetruetrue00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn 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available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse001993-12-20falsefalsetruetruefalse2falsetruefalse00falsefalsetruetruefalse3falsetruefalse00falsefalsetruetruefalse4falsetruefalse002003-10-03falsefalsetruetruefalse5falsetruefalse002007-12-31falsefalsetruetruefalse6falsetruefalse002010-05-01falsefalsetruetruefalse7falsetruefalse001994-11-02falsefalsetruetruefalse8falsetruefalse00falsefalsetruetruefalse9falsetruefalse00falsefalsetruetruefalse10falsetruefalse001994-11-02falsefalsetruetruefalse11falsetruefalse002006-05-01falsefalsetruetruefalse12falsetruefalse002010-05-01falsefalsetruetruefalse13falsetruefalse001956-02-10falsefalsetruetruefalse14falsetruefalse00falsefalsetruetruefalse15falsetruefalse00falsefalsetruetruefalse16falsetruefalse002003-10-03falsefalsetruetruefalse17falsetruefalse002006-10-02falsefalsetruetruefalse18falsetruefalse002010-05-01falsefalsetruetruefalse19falsetruefalse002009-06-05falsefalsetruetruefalse20falsetruefalse00falsefalsetruetruefalse21falsetruefalse00falsefalsetruetruefalse22falsetruefalse002009-06-05falsefalsetruetruefalse23falsetruefalse002010-05-01falsefalsetruetruefalse24falsetruefalse00falsefalsetruetruefalse25falsetruefalse00falsefalsetruetruefalse26falsetruefalse00falsefalsetruetruefalse27falsetruefalse00falsefalsetruetruefalse28falsetruefalse00falsefalsetruetruefalse29falsetruefalse00falsefalsetruetruefalse30falsetruefalse00falsefalsetruetruefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalsefalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009200MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseGlobal Hard Assets Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009200Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024996Memberrr_ProspectusShareClassAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberGlobal Hard Assets FundClass ABefore 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taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_SP500_Index_reflects_no_deduction_for_fees_expenses_or_taxesMemberrr_PerformanceMeasureAxisexplicitMemberGlobal Hard Assets FundShare ClassesS&P®500 Index (reflects no deduction for fees, expenses or taxes)Standard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.15060.1506falsefalsefalsetruefalse2truetruetrue0.02290.0229falsefalsefalsetruefalse3truetruetrue0.01410.0141falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalseOthernanafalsefalse1After 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. These returns are shown for one class of shares only; after tax-returns for the other classes may vary. Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-deferred account, such as a 401(k) plan or Investment Retirement Account.58Average Annual Total Returns Global Hard Assets FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009200MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to PerformanceTableData.No authoritative reference available.falsefalse63false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturn1falsefalsefalse00International Investors Gold FundInternational Investors Gold Fundfalsefalsefalsefalsefalse3falsefalseUSDtruefalse{dei_LegalEntityAxis} : International Investors Gold Fund 4/14/2011 - 4/14/2011 USD ($) $c18_S000009199Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalsecik0000768847_S000009199Memberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse65false0rr_RiskReturnHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00RISK/RETURNfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Investment Objectives/Goals Include the following information, in plain English under rule 421(d) under the Securities Act, in the order and subject matter indicatedReference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 falsefalse66false0rr_ObjectiveHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00INVESTMENT OBJECTIVEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse67false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The International Investors Gold Fund seeks long-term capital appreciation by investing in common stocks of gold-mining companies. The Fund may take current income into consideration when choosing investments.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse68false0rr_ExpenseHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00FUND FEES AND EXPENSESfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Fee Table Includes the following information, in plain English under rule 421(d) under the Securities Act, after Item 2 Fees and expenses of the Fund This table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Shareholder Fees (fees paid directly from your investment) Example 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 you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be You would pay the following expenses if you did not redeem your shares The Example does not reflect sales charges (loads) on reinvested dividends [and other distributions]. If these sales charges (loads) were included, your costs would be higher. Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. 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 __% of the average value of its whole portfolio. Instructions. A.3.instructions.6 New Funds. For purposes of this Item, a "New Fund" is a Fund that does not include in Form N-1A financial statements reporting operating results or that includes financial statements for the Fund's initial fiscal year reporting operating results for a period of 6 months or less. The following Instructions apply to New Funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph d -Subsection instructions falsefalse69false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds. More information about these and other discounts is available from your financial professional and in the &#8220;Shareholder Information&#8221; section of the Fund&#8217;s prospectus and in the &#8220;Availability of Discounts&#8221; and &#8220;Breakpoint Linkage Rules for Discounts&#8221; sections of the Fund&#8217;s SAI.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse70false0rr_ShareholderFeesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Shareholder Fees (fees paid directly from your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subsection table falsefalse71false0rr_ShareholderFeesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact cik0000768847_S000009199Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact cik0000768847_S000009199Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsehttp://xbrl.sec.gov/rr/role/ShareholderFeesDatafalsefalse020010 - Schedule - Shareholder Feestruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009199MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024994Memberrr_ProspectusShareClassAxisexplicitMemberInternational Investors Gold FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009199MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024995Memberrr_ProspectusShareClassAxisexplicitMemberInternational Investors Gold FundClass CusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009199MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000033046Memberrr_ProspectusShareClassAxisexplicitMemberInternational Investors Gold FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$4falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009199MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088111Memberrr_ProspectusShareClassAxisexplicitMemberInternational Investors Gold FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.05750.0575falsefalsefalsetruefalse6truetruetrue0.00000.0000falsefalsefalsetruefalse7truetruetrue0.00000.0000falsefalsefalsetruefalse8truetruetrue0.00000.0000falsefalsefalsetruefalse9truetruetrue0.05750.0575falsefalsefalsetruefalse10truetruetrue0.00000.0000falsefalsefalsetruefalse11truetruetrue0.00000.0000falsefalsefalsetruefalse12truetruetrue0.00000.0000falsefalsefalsetruefalse13truetruetrue0.05750.0575falsefalsefalsetruefalse14truetruetrue0.00000.0000falsefalsefalsetruefalse15truetruetrue0.00000.0000falsefalsefalsetruefalse16truetruetrue0.05750.0575falsefalsefalsetruefalse17truetruetrue0.00000.0000falsefalsefalsetruefalse18truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*4false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.00000.0000falsefalsefalsetruefalse6truetruetrue0.01000.0100falsefalsefalsetruefalse7truetruetrue0.00000.0000falsefalsefalsetruefalse8truetruetrue0.00000.0000falsefalsefalsetruefalse9truetruetrue0.00000.0000falsefalsefalsetruefalse10truetruetrue0.01000.0100falsefalsefalsetruefalse11truetruetrue0.00000.0000falsefalsefalsetruefalse12truetruetrue0.00000.0000falsefalsefalsetruefalse13truetruetrue0.00000.0000falsefalsefalsetruefalse14truetruetrue0.00000.0000falsefalsefalsetruefalse15truetruetrue0.00000.0000falsefalsefalsetruefalse16truetruetrue0.00000.0000falsefalsefalsetruefalse17truetruetrue0.00000.0000falsefalsefalsetruefalse18truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse0rr_MaximumDeferredSalesChargeOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse42Shareholder Fees International Investors Gold FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009199MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ShareholderFeesData.No authoritative reference available.falsefalse72false0rr_OperatingExpensesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 7 -Subsection table falsefalse73false0rr_AnnualFundOperatingExpensesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact cik0000768847_S000009199Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact cik0000768847_S000009199Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsehttp://xbrl.sec.gov/rr/role/OperatingExpensesDatafalsefalse020020 - Schedule - Annual Fund Operating Expensestruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009199MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024994Memberrr_ProspectusShareClassAxisexplicitMemberInternational Investors Gold FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009199MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024995Memberrr_ProspectusShareClassAxisexplicitMemberInternational Investors Gold FundClass CusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009199MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000033046Memberrr_ProspectusShareClassAxisexplicitMemberInternational Investors Gold FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$4falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009199MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088111Memberrr_ProspectusShareClassAxisexplicitMemberInternational Investors Gold FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00750.0075falsefalsefalsetruefalse2truetruetrue0.00750.0075falsefalsefalsetruefalse3truetruetrue0.00750.0075falsefalsefalsetruefalse4truetruetrue0.00750.0075falsefalsefalsetruefalse5truetruetrue0.00980.0098falsefalsefalsetruefalse6truetruetrue0.00980.0098falsefalsefalsetruefalse7truetruetrue0.00980.0098falsefalsefalsetruefalse8truetruetrue0.00980.0098falsefalsefalsetruefalse9truetruetrue0.00630.0063falsefalsefalsetruefalse10truetruetrue0.00630.0063falsefalsefalsetruefalse11truetruetrue0.00630.0063falsefalsefalsetruefalse12truetruetrue0.00630.0063falsefalsefalsetruefalse13truetruetrue0.01320.0132falsefalsefalsetruefalse14truetruetrue0.01320.0132falsefalsefalsetruefalse15truetruetrue0.01320.0132falsefalsefalsetruefalse16truetruetrue0.00750.0075falsefalsefalsetruefalse17truetruetrue0.00750.0075falsefalsefalsetruefalse18truetruetrue0.00750.0075falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse0rr_ManagementFeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00630.0063falsefalsefalsetruefalse2truetruetrue0.00630.0063falsefalsefalsetruefalse3truetruetrue0.00630.0063falsefalsefalsetruefalse4truetruetrue0.00630.0063falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*4false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.00250.0025falsefalsefalsetruefalse6truetruetrue0.01000.0100falsefalsefalsetruefalse7truetruetrue0.00000.0000falsefalsefalsetruefalse8truetruetrue0.00000.0000falsefalsefalsetruefalse9truetruetrue0.00250.0025falsefalsefalsetruefalse10truetruetrue0.01000.0100falsefalsefalsetruefalse11truetruetrue0.00000.0000falsefalsefalsetruefalse12truetruetrue0.00000.0000falsefalsefalsetruefalse13truetruetrue0.00250.0025falsefalsefalsetruefalse14truetruetrue0.00000.0000falsefalsefalsetruefalse15truetruetrue0.00000.0000falsefalsefalsetruefalse16truetruetrue0.00250.0025falsefalsefalsetruefalse17truetruetrue0.00000.0000falsefalsefalsetruefalse18truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse0rr_DistributionAndService12b1FeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse3falseRowprimaryElement*7false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00740.0074falsefalsefalsetruefalse2truetruetrue0.00860.0086falsefalsefalsetruefalse3truetruetrue0.01480.0148falsefalsefalsetruefalse4truetruetrue0.00980.0098falsefalsefalsetruefalse5truetruetrue0.00190.0019falsefalsefalsetruefalse6truetruetrue0.00170.0017falsefalsefalsetruefalse7truetruetrue0.00060.0006falsefalsefalsetruefalse8truetruetrue0.00110.0011falsefalsefalsetruefalse9truetruetrue0.00360.0036falsefalsefalsetruefalse10truetruetrue0.00310.0031falsefalsefalsetruefalse11truetruetrue0.00370.0037falsefalsefalsetruefalse12truetruetrue0.00470.0047falsefalsefalsetruefalse13falsetruetrue00falsefalsefalsetruefalse14falsetruetrue00falsefalsefalsetruefalse15falsetruetrue00falsefalsefalsetruefalse16truetruetrue0.00520.0052[1]falsefalsefalsetruefalse17truetruetrue0.00230.0023[1]falsefalsefalsetruefalse18truetruetrue0.00520.0052[1]falsefalsefalsetruefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse0rr_OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00360.0036falsefalsefalsetruefalse2truetruetrue0.00310.0031falsefalsefalsetruefalse3truetruetrue0.00370.0037falsefalsefalsetruefalse4truetruetrue0.00470.0047falsefalsefalsetruefalseOthernanafalsefalse4falseRowprimaryElement*8false0rr_AcquiredFundFeesAndExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00falsefalsefalsetruefalse2falsetruetrue00falsefalsefalsetruefalse3falsetruetrue00falsefalsefalsetruefalse4falsetruetrue00falsefalsefalsetruefalse5truetruetrue0.00010.0001falsefalsefalsetruefalse6truetruetrue0.00010.0001falsefalsefalsetruefalse7truetruetrue0.00010.0001falsefalsefalsetruefalse8truetruetrue0.00010.0001falsefalsefalsetruefalse9truetruetrue0.00010.0001falsefalsefalsetruefalse10truetruetrue0.00010.0001falsefalsefalsetruefalse11truetruetrue0.00010.0001falsefalsefalsetruefalse12truetruetrue0.00010.0001falsefalsefalsetruefalse13truetruetrue0.00780.0078falsefalsefalsetruefalse14truetruetrue0.00780.0078falsefalsefalsetruefalse15truetruetrue0.00780.0078falsefalsefalsetruefalse16falsetruetrue00falsefalsefalsetruefalse17falsetruetrue00falsefalsefalsetruefalse18falsetruetrue00falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse0rr_AcquiredFundFeesAndExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00010.0001falsefalsefalsetruefalse2truetruetrue0.00010.0001falsefalsefalsetruefalse3truetruetrue0.00010.0001falsefalsefalsetruefalse4truetruetrue0.00010.0001falsefalsefalsetruefalseOthernanafalsefalse5falseRowprimaryElement*9false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01740.0174falsefalsefalsetruefalse2truetruetrue0.02610.0261falsefalsefalsetruefalse3truetruetrue0.02230.0223falsefalsefalsetruefalse4truetruetrue0.01730.0173falsefalsefalsetruefalse5truetruetrue0.01430.0143falsefalsefalsetruefalse6truetruetrue0.02160.0216falsefalsefalsetruefalse7truetruetrue0.01050.0105falsefalsefalsetruefalse8truetruetrue0.01100.0110falsefalsefalsetruefalse9truetruetrue0.01250.0125falsefalsefalsetruefalse10truetruetrue0.01950.0195falsefalsefalsetruefalse11truetruetrue0.01010.0101falsefalsefalsetruefalse12truetruetrue0.01110.0111falsefalsefalsetruefalse13truetruetrue0.03370.0337falsefalsefalsetruefalse14truetruetrue0.03130.0313falsefalsefalsetruefalse15truetruetrue0.03060.0306falsefalsefalsetruefalse16truetruetrue0.01520.0152falsefalsefalsetruefalse17truetruetrue0.00980.0098falsefalsefalsetruefalse18truetruetrue0.01270.0127falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse0rr_ExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01250.0125falsefalsefalsetruefalse2truetruetrue0.01950.0195falsefalsefalsetruefalse3truetruetrue0.01010.0101falsefalsefalsetruefalse4truetruetrue0.01110.0111falsefalsefalsetruefalseOthernanafalsefalse45Annual Fund Operating Expenses International Investors Gold FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009199MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to OperatingExpensesData.No authoritative reference available.falsefalse74false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Expense ExamplefalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse75false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following 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 either redeem all of your shares at the end of these periods or continue to hold them. The example also assumes that your investment has a 5% return each year and that the Fund&#8217;s operating expenses remain the same. Although your actual expenses may be higher or lower, based on these assumptions, your costs would be:</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThe Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection example falsefalse76false0rr_ExpenseExampleByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00SoldfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse77false0rr_ExpenseExampleWithRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact cik0000768847_S000009199Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact cik0000768847_S000009199Member column rr_ProspectusShareClassAxis compact * row primary compact * ~truehttp://xbrl.sec.gov/rr/role/ExpenseExamplefalsefalse020030 - Schedule - Expense Example {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue742742falsefalsefalsetruefalse2truefalsetrue353353falsefalsefalsetruefalse3truefalsetrue127127falsefalsefalsetruefalse4truefalsetrue173173falsefalsefalsetruefalse5truefalsetrue708708falsefalsefalsetruefalse6truefalsetrue319319falsefalsefalsetruefalse7truefalsetrue103103falsefalsefalsetruefalse8truefalsetrue112112falsefalsefalsetruefalse9truefalsetrue695695falsefalsefalsetruefalse10truefalsetrue298298falsefalsefalsetruefalse11truefalsetrue103103falsefalsefalsetruefalse12truefalsetrue113113falsefalsefalsetruefalse13truefalsetrue340340falsefalsefalsetruefalse14truefalsetrue303303falsefalsefalsetruefalse15truefalsetrue309309falsefalsefalsetruefalse16truefalsetrue666666falsefalsefalsetruefalse17truefalsetrue6666falsefalsefalsetruefalse18truefalsetrue7272falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalsefalseUSDfalsefalse$2falseColumnprimaryElement*4false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue10911091falsefalsefalsetruefalse2truefalsetrue801801falsefalsefalsetruefalse3truefalsetrue603603falsefalsefalsetruefalse4truefalsetrue542542falsefalsefalsetruefalse5truefalsetrue998998falsefalsefalsetruefalse6truefalsetrue676676falsefalsefalsetruefalse7truefalsetrue330330falsefalsefalsetruefalse8truefalsetrue350350falsefalsefalsetruefalse9truefalsetrue949949falsefalsefalsetruefalse10truefalsetrue612612falsefalsefalsetruefalse11truefalsetrue322322falsefalsefalsetruefalse12truefalsetrue353353falsefalsefalsetruefalse13truefalsetrue10361036falsefalsefalsetruefalse14truefalsetrue954954falsefalsefalsetruefalse15truefalsetrue945945falsefalsefalsetruefalse16truefalsetrue975975falsefalsefalsetruefalse17truefalsetrue279279falsefalsefalsetruefalse18truefalsetrue346346falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalseUSDfalsefalse$3falseColumnprimaryElement*5false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue14641464falsefalsefalsetruefalse2truefalsetrue13751375falsefalsefalsetruefalse3truefalsetrue11051105falsefalsefalsetruefalse4truefalsetrue936936falsefalsefalsetruefalse5truefalsetrue13081308falsefalsefalsetruefalse6truefalsetrue11591159falsefalsefalsetruefalse7truefalsetrue575575falsefalsefalsetruefalse8truefalsetrue606606falsefalsefalsetruefalse9truefalsetrue12221222falsefalsefalsetruefalse10truefalsetrue10521052falsefalsefalsetruefalse11truefalsetrue558558falsefalsefalsetruefalse12truefalsetrue612612falsefalsefalsetruefalse13truefalsetrue17551755falsefalsefalsetruefalse14truefalsetrue16291629falsefalsefalsetruefalse15truefalsetrue16061606falsefalsefalsetruefalse16falsefalsetrue00falsefalsefalsetruefalse17falsefalsetrue00falsefalsefalsetruefalse18falsefalsetrue00falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalseUSDfalsefalse$4falseColumnprimaryElement*6false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue25092509falsefalsefalsetruefalse2truefalsetrue29362936falsefalsefalsetruefalse3truefalsetrue24882488falsefalsefalsetruefalse4truefalsetrue20382038falsefalsefalsetruefalse5truefalsetrue21862186falsefalsefalsetruefalse6truefalsetrue24932493falsefalsefalsetruefalse7truefalsetrue12791279falsefalsefalsetruefalse8truefalsetrue13401340falsefalsefalsetruefalse9truefalsetrue19991999falsefalsefalsetruefalse10truefalsetrue22752275falsefalsefalsetruefalse11truefalsetrue12361236falsefalsefalsetruefalse12truefalsetrue13521352falsefalsefalsetruefalse13truefalsetrue36583658falsefalsefalsetruefalse14truefalsetrue34303430falsefalsefalsetruefalse15truefalsetrue33743374falsefalsefalsetruefalse16falsefalsetrue00falsefalsefalsetruefalse17falsefalsetrue00falsefalsefalsetruefalse18falsefalsetrue00falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009199MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024994Memberrr_ProspectusShareClassAxisexplicitMemberInternational Investors Gold FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue695695falsefalsefalsetruefalse2truefalsetrue949949falsefalsefalsetruefalse3truefalsetrue12221222falsefalsefalsetruefalse4truefalsetrue19991999falsefalsefalsetruefalseOthernanafalsefalse2falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009199MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024995Memberrr_ProspectusShareClassAxisexplicitMemberInternational Investors Gold FundClass CusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue298298falsefalsefalsetruefalse2truefalsetrue612612falsefalsefalsetruefalse3truefalsetrue10521052falsefalsefalsetruefalse4truefalsetrue22752275falsefalsefalsetruefalseOthernanafalsefalse3falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009199MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000033046Memberrr_ProspectusShareClassAxisexplicitMemberInternational Investors Gold FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue103103falsefalsefalsetruefalse2truefalsetrue322322falsefalsefalsetruefalse3truefalsetrue558558falsefalsefalsetruefalse4truefalsetrue12361236falsefalsefalsetruefalseOthernanafalsefalse4falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009199MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088111Memberrr_ProspectusShareClassAxisexplicitMemberInternational Investors Gold FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue113113falsefalsefalsetruefalse2truefalsetrue353353falsefalsefalsetruefalse3truefalsetrue612612falsefalsefalsetruefalse4truefalsetrue13521352falsefalsefalsetruefalseOthernanafalsefalse44Expense Example International Investors Gold Fund (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009199MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExample.No authoritative reference available.falsefalse78false0rr_ExpenseExampleNoRedemptionByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00HeldfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse79false0rr_ExpenseExampleNoRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption column dei_LegalEntityAxis compact cik0000768847_S000009199Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption column dei_LegalEntityAxis compact cik0000768847_S000009199Member column rr_ProspectusShareClassAxis compact * row primary compact * ~truehttp://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemptionfalsefalse020040 - Schedule - Expense Example, No Redemption {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue742742falsefalsefalsetruefalse2truefalsetrue253253falsefalsefalsetruefalse3truefalsetrue127127falsefalsefalsetruefalse4truefalsetrue173173falsefalsefalsetruefalse5truefalsetrue708708falsefalsefalsetruefalse6truefalsetrue219219falsefalsefalsetruefalse7truefalsetrue103103falsefalsefalsetruefalse8truefalsetrue112112falsefalsefalsetruefalse9truefalsetrue695695falsefalsefalsetruefalse10truefalsetrue198198falsefalsefalsetruefalse11truefalsetrue103103falsefalsefalsetruefalse12truefalsetrue113113falsefalsefalsetruefalse13truefalsetrue340340falsefalsefalsetruefalse14truefalsetrue303303falsefalsefalsetruefalse15truefalsetrue309309falsefalsefalsetruefalse16truefalsetrue666666falsefalsefalsetruefalse17truefalsetrue6666falsefalsefalsetruefalse18truefalsetrue7272falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalsefalseUSDfalsefalse$2falseColumnprimaryElement*4false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue10911091falsefalsefalsetruefalse2truefalsetrue801801falsefalsefalsetruefalse3truefalsetrue603603falsefalsefalsetruefalse4truefalsetrue542542falsefalsefalsetruefalse5truefalsetrue998998falsefalsefalsetruefalse6truefalsetrue676676falsefalsefalsetruefalse7truefalsetrue330330falsefalsefalsetruefalse8truefalsetrue350350falsefalsefalsetruefalse9truefalsetrue949949falsefalsefalsetruefalse10truefalsetrue612612falsefalsefalsetruefalse11truefalsetrue322322falsefalsefalsetruefalse12truefalsetrue353353falsefalsefalsetruefalse13truefalsetrue10361036falsefalsefalsetruefalse14truefalsetrue954954falsefalsefalsetruefalse15truefalsetrue945945falsefalsefalsetruefalse16truefalsetrue975975falsefalsefalsetruefalse17truefalsetrue279279falsefalsefalsetruefalse18truefalsetrue346346falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalsefalseUSDfalsefalse$3falseColumnprimaryElement*5false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue14641464falsefalsefalsetruefalse2truefalsetrue13751375falsefalsefalsetruefalse3truefalsetrue11051105falsefalsefalsetruefalse4truefalsetrue936936falsefalsefalsetruefalse5truefalsetrue13081308falsefalsefalsetruefalse6truefalsetrue11591159falsefalsefalsetruefalse7truefalsetrue575575falsefalsefalsetruefalse8truefalsetrue606606falsefalsefalsetruefalse9truefalsetrue12221222falsefalsefalsetruefalse10truefalsetrue10521052falsefalsefalsetruefalse11truefalsetrue558558falsefalsefalsetruefalse12truefalsetrue612612falsefalsefalsetruefalse13truefalsetrue17551755falsefalsefalsetruefalse14truefalsetrue16291629falsefalsefalsetruefalse15truefalsetrue16061606falsefalsefalsetruefalse16falsefalsetrue00falsefalsefalsetruefalse17falsefalsetrue00falsefalsefalsetruefalse18falsefalsetrue00falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalsefalseUSDfalsefalse$4falseColumnprimaryElement*6false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue25092509falsefalsefalsetruefalse2truefalsetrue29362936falsefalsefalsetruefalse3truefalsetrue24882488falsefalsefalsetruefalse4truefalsetrue20382038falsefalsefalsetruefalse5truefalsetrue21862186falsefalsefalsetruefalse6truefalsetrue24932493falsefalsefalsetruefalse7truefalsetrue12791279falsefalsefalsetruefalse8truefalsetrue13401340falsefalsefalsetruefalse9truefalsetrue19991999falsefalsefalsetruefalse10truefalsetrue22752275falsefalsefalsetruefalse11truefalsetrue12361236falsefalsefalsetruefalse12truefalsetrue13521352falsefalsefalsetruefalse13truefalsetrue36583658falsefalsefalsetruefalse14truefalsetrue34303430falsefalsefalsetruefalse15truefalsetrue33743374falsefalsefalsetruefalse16falsefalsetrue00falsefalsefalsetruefalse17falsefalsetrue00falsefalsefalsetruefalse18falsefalsetrue00falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalsefalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009199MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024994Memberrr_ProspectusShareClassAxisexplicitMemberInternational Investors Gold FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue695695falsefalsefalsetruefalse2truefalsetrue949949falsefalsefalsetruefalse3truefalsetrue12221222falsefalsefalsetruefalse4truefalsetrue19991999falsefalsefalsetruefalseOthernanafalsefalse2falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009199MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024995Memberrr_ProspectusShareClassAxisexplicitMemberInternational Investors Gold FundClass CusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue198198falsefalsefalsetruefalse2truefalsetrue612612falsefalsefalsetruefalse3truefalsetrue10521052falsefalsefalsetruefalse4truefalsetrue22752275falsefalsefalsetruefalseOthernanafalsefalse3falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009199MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000033046Memberrr_ProspectusShareClassAxisexplicitMemberInternational Investors Gold FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue103103falsefalsefalsetruefalse2truefalsetrue322322falsefalsefalsetruefalse3truefalsetrue558558falsefalsefalsetruefalse4truefalsetrue12361236falsefalsefalsetruefalseOthernanafalsefalse4falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009199MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088111Memberrr_ProspectusShareClassAxisexplicitMemberInternational Investors Gold FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue113113falsefalsefalsetruefalse2truefalsetrue353353falsefalsefalsetruefalse3truefalsetrue612612falsefalsefalsetruefalse4truefalsetrue13521352falsefalsefalsetruefalseOthernanafalsefalse44Expense Example, No Redemption International Investors Gold Fund (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009199MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExampleNoRedemption.No authoritative reference available.falsefalse80false0rr_PortfolioTurnoverHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PORTFOLIO TURNOVERfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 5 -Subsection instructions falsefalse81false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 33% of the average value of its portfolio.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalse82false0rr_StrategyHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL INVESTMENT STRATEGIESfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse83false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Under normal conditions, the Fund invests at least 80% of its net assets in securities of companies principally engaged in gold-related activities, instruments that derive their value from gold, gold coins and bullion. A company principally engaged in gold-related activities is one that derives at least 50% of its revenues from gold-related activities, including the exploration, mining or processing of or dealing in gold. The Fund concentrates its investments in the gold-mining industry and therefore invests 25% or more of its total assets in such industry. The Fund is considered to be &#8220;non-diversified&#8221; which means that it may invest in fewer securities than a &#8220;diversified&#8221; fund.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund invests in securities of companies with economic ties to countries throughout the world, including the U.S. Under ordinary circumstances, the Fund will invest in securities of issuers from a number of different countries. The Fund may invest in securities of companies of any capitalization range. The Fund primarily invests in companies that the portfolio manager believes represent value opportunities and/or that have growth potential within their market niche, through their ability to increase production capacity at reasonable cost or make gold discoveries around the world. The portfolio manager utilizes both a macro-economic examination of gold market themes and a fundamental analysis of prospective companies in the search for value and growth opportunities.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may invest up to 12.5% of its net assets, as of the date of the investment, in gold and silver coins, as well as gold, silver, platinum and palladium bullion. The Fund&#8217;s investments in coins and bullion will not earn income, and the sole source of return to the Fund from these investments will be from gains or losses realized on the sale of such investments.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may use derivative instruments, such as structured notes, futures, options and swap agreements, to gain or hedge exposure. The Fund may invest up to 20% of its net assets in securities issued by other investment companies, including exchange-traded funds (&#8220;ETFs&#8221;). The Fund may also invest in money market funds, but these investments are not subject to this limitation. The Fund may invest in ETFs to participate in, or gain rapid exposure to, certain market sectors, or when direct investments in certain countries are not permitted.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse84false0rr_RiskHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL RISKSfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subsection b falsefalse85false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">There is no assurance that the Fund will achieve its investment objective. The Fund&#8217;s share price and return will fluctuate with changes in the market value of the Fund&#8217;s portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Commodities and Commodity-Linked Derivatives.</b> Exposure to the commodities markets, such as precious metals, industrial metals, gas and other energy products and natural resources, may subject a Fund to greater volatility than investments in traditional securities. The commodities markets may fluctuate widely based on a variety of factors including changes in overall market movements, political and economic events and policies, war, acts of terrorism and changes in interest rates or inflation rates. Because the value of a commodity-linked derivative instrument and structured note typically are based upon the price movements of physical commodities, the value of these securities will rise or fall in response to changes in the underlying commodities or related index of investment.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Concentration in Gold-Mining Industry.</b> The Fund may be subject to greater risks and market fluctuations than a fund whose portfolio has exposure to a broader range of industries. The Fund may be susceptible to financial, economic, political or market events, as well as government regulation, impacting the gold industry. Fluctuations in the price of gold often dramatically affect the profitability of companies in the gold industry.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Derivatives.</b> The use of derivatives, such as swap agreements, options, warrants, futures contracts, currency forwards and structured notes, presents risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. The use of derivatives can lead to losses because of adverse movements in the price or value of the underlying security, asset, index or reference rate. Derivative strategies often involve leverage, which may exaggerate a loss, potentially causing a Fund to lose more money than it would have lost had it invested in the underlying security. Also, a liquid secondary market may not always exist for the Fund&#8217;s derivative positions at times when the Fund might wish to terminate or sell such positions and over the counter instruments may be illiquid.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Direct Investments.</b> Direct investments may involve a high degree of business and financial risk that can result in substantial losses. Because of the absence of any public trading market for these investments, a Fund may take longer to liquidate these positions than would be the case for publicly traded securities. Direct investments are generally considered illiquid and will be aggregated with other illiquid investments for purposes of the limitation on illiquid investments.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Emerging Markets Securities.</b> Emerging markets securities typically present even greater exposure to the risks described under &#8220;Foreign Securities&#8221; and may be particularly sensitive to certain economic changes. Emerging markets securities are exposed to a number of risks that may make these investments volatile in price or difficult to trade.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Foreign Currency Transactions.</b> An investment transacted in a foreign currency may lose value due to fluctuations in the rate of exchange. These fluctuations can make the return on an investment go up or down, entirely apart from the quality or performance of the investment itself.</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Foreign Securities.</b> Foreign investments are subject to greater risks than U.S. domestic investments. These additional risks may include exchange rate fluctuations and exchange controls; less publicly available information; more volatile or less liquid securities markets; and the possibility of arbitrary action by foreign governments, or political, economic or social instability. Foreign companies also may be subject to significantly higher levels of taxation than U.S. companies, including potentially confiscatory levels of taxation, thereby reducing the earnings potential of such foreign companies.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Investments in Other Investment Companies.</b> A Fund&#8217;s investment in another investment company may subject the Fund indirectly to the underlying risks of the investment company. The Fund also will bear its share of the underlying investment company&#8217;s fees and expenses, which are in addition to the Fund&#8217;s own fees and expenses.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Market.</b> Market risk refers to the risk that the market prices of securities that a Fund holds will rise or fall, sometimes rapidly or unpredictably. In general, equity securities tend to have greater price volatility than debt securities.</font></p> <p style="margin:3.5mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Non-Diversification.</b> A non-diversified fund&#8217;s greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund&#8217;s portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio.</font></p> <p style="margin:3.5mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Small- and Medium-Capitalization Companies.</b> Securities of small- and medium-sized companies often have greater price volatility, lower trading volume and less liquidity than larger more established companies. The stocks of small- and medium-sized companies may have returns that vary, sometimes significantly, from the overall stock market.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringNarrative Risk Disclosure. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Clause instruction -Subsection b falsefalse86false0rr_BarChartAndPerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PERFORMANCEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse87false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund&#8217;s performance from year to year and by showing how the Fund&#8217;s average annual total returns compare with those of a broad measure of market performance and one or more other performance measures. For instance, the NYSE Arca Gold Miners (GDM) Index is a modified market capitalization-weighted index comprised of publicly traded companies involved primarily in the mining for gold. The GDM Index has only been calculated in real time by an independent calculation agent since October 7, 2004. The Fund&#8217;s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. The annual returns in the bar chart are for the Fund&#8217;s Class&#160;A shares and do not reflect sales loads. If sales loads were reflected, returns would be less than those shown.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Additionally, large purchases and/or redemptions of shares of a class, relative to the amount of assets represented by the class, may cause the annual returns for each class to differ. During the 12-month period ended December 31, 2008, the performance of the Class I shares of the Fund was materially affected by significant redemptions of Class I shares during that period. Updated performance information for the Fund is available on the Van Eck website at vaneck.com.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse88false0rr_BarChartNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p align="center"><font style="font-family:sans-serif; font-size:3.5mm;"></font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringProvide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph i -Subsection b falsefalse89false0rr_BarChartHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00CLASS A: Annual Total Returns (%) as of 12/31falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse90false0rr_BarChartTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact cik0000768847_S000009199Member column rr_ProspectusShareClassAxis compact cik0000768847_C000024994Member row primary compact * ~falsefalseBarChart3.jpg~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact cik0000768847_S000009199Member column rr_ProspectusShareClassAxis compact cik0000768847_C000024994Member row primary compact * ~falsehttp://xbrl.sec.gov/rr/role/BarChartDatafalsefalse020050 - Schedule - Annual Total Returnstruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009199MemberColumnrr_ProspectusShareClassAxisAxiscik0000768847_C000024994MemberColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024994Memberrr_ProspectusShareClassAxisexplicitMemberInternational Investors Gold FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_AnnualReturn2001rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.2732-0.2732falsefalsefalsetruefalse2truetruefalse-0.0856-0.0856falsefalsefalsetruefalse3truetruefalse0.20740.2074falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse0rr_AnnualReturn2001truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.20740.2074falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*4false0rr_AnnualReturn2002rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.2504-0.2504falsefalsefalsetruefalse2truetruefalse0.06770.0677falsefalsefalsetruefalse3truetruefalse0.90480.9048falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse0rr_AnnualReturn2002truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.90480.9048falsefalsefalsetruefalseOthernanafalsefalse3falseRowprimaryElement*5false0rr_AnnualReturn2003rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.75050.7505falsefalsefalsetruefalse2truetruefalse0.42440.4244falsefalsefalsetruefalse3truetruefalse0.44250.4425falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse0rr_AnnualReturn2003truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.44250.4425falsefalsefalsetruefalseOthernanafalsefalse4falseRowprimaryElement*6false0rr_AnnualReturn2004rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.19790.1979falsefalsefalsetruefalse2truetruefalse0.22870.2287falsefalsefalsetruefalse3truetruefalse-0.0773-0.0773falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse0rr_AnnualReturn2004truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.0773-0.0773falsefalsefalsetruefalseOthernanafalsefalse5falseRowprimaryElement*7false0rr_AnnualReturn2005rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.29770.2977falsefalsefalsetruefalse2truetruefalse0.48720.4872falsefalsefalsetruefalse3truetruefalse0.35620.3562falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse0rr_AnnualReturn2005truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.35620.3562falsefalsefalsetruefalseOthernanafalsefalse6falseRowprimaryElement*8false0rr_AnnualReturn2006rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.38980.3898falsefalsefalsetruefalse2truetruefalse0.22860.2286falsefalsefalsetruefalse3truetruefalse0.45230.4523falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse0rr_AnnualReturn2006truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.45230.4523falsefalsefalsetruefalseOthernanafalsefalse7falseRowprimaryElement*9false0rr_AnnualReturn2007rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.35660.3566falsefalsefalsetruefalse2truetruefalse0.42620.4262falsefalsefalsetruefalse3truetruefalse0.27410.2741falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse0rr_AnnualReturn2007truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.27410.2741falsefalsefalsetruefalseOthernanafalsefalse8falseRowprimaryElement*10false0rr_AnnualReturn2008rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.6812-0.6812falsefalsefalsetruefalse2truetruefalse-0.4468-0.4468falsefalsefalsetruefalse3truetruefalse-0.2903-0.2903falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. 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The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse0rr_AnnualReturn2008truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.2903-0.2903falsefalsefalsetruefalseOthernanafalsefalse9falseRowprimaryElement*11false0rr_AnnualReturn2009rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse1.20371.2037falsefalsefalsetruefalse2truetruefalse0.52460.5246falsefalsefalsetruefalse3truetruefalse0.63750.6375falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse0rr_AnnualReturn2009truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.63750.6375falsefalsefalsetruefalseOthernanafalsefalse10falseRowprimaryElement*12false0rr_AnnualReturn2010rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.28170.2817falsefalsefalsetruefalse2truetruefalse0.28430.2843falsefalsefalsetruefalse3truetruefalse0.50990.5099falsefalsefalsetruefalse4truetruefalse0.04560.0456falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse0rr_AnnualReturn2010truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.50990.5099falsefalsefalsetruefalseOthernanafalsefalse110Annual Total Returns UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000009199MemberColumnrr_ProspectusShareClassAxisAxiscik0000768847_C000024994MemberColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to BarChartData.No authoritative reference available.falsefalse91false0rr_BarChartClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<table cellspacing="0" style="margin-left:0.00%;margin-right:0.00%;width:100.00%;"> <tr valign="top"> <td style="width:13.69%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:8.73%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:2.63%"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> <td style="width:77.58%;"> <p><font style="font-size:0.6mm;">&#160;</font></p> </td> </tr> <tr valign="top"> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Best Quarter:</b></font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">+44.96%</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">1Q &#8217;02</font></p> </td> </tr> <tr valign="top"> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Worst Quarter:</b></font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">-31.82%</font></p> </td> <td width="3">&#160;</td> <td> <p><font style="font-family:sans-serif; font-size:3.5mm;">3Q &#8217;08</font></p> </td> </tr> </table>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse92false0rr_AverageAnnualReturnCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Average Annual Total Returns as of 12/31/10falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 5 -Subsection b falsefalse93false0rr_PerformanceTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact cik0000768847_S000009199Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact cik0000768847_S000009199Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~truehttp://xbrl.sec.gov/rr/role/PerformanceTableDatafalsefalse020060 - Schedule - Average Annual Total Returns {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.20830.2083falsefalsefalsetruefalse2truetruetrue0.20720.2072[1]falsefalsefalsetruefalse3truetruetrue0.13540.1354[1]falsefalsefalsetruefalse4truetruetrue0.26160.2616falsefalsefalsetruefalse5truetruetrue0.28750.2875falsefalsefalsetruefalse6falsetruetrue00falsefalsefalsetruefalse7truetruetrue0.21040.2104falsefalsefalsetruefalse8truetruetrue0.20860.2086[1]falsefalsefalsetruefalse9truetruetrue0.13670.1367[1]falsefalsefalsetruefalse10truetruetrue0.26440.2644falsefalsefalsetruefalse11truetruetrue0.28930.2893falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.42340.4234falsefalsefalsetruefalse14truetruetrue0.37130.3713[1]falsefalsefalsetruefalse15truetruetrue0.28940.2894[1]falsefalsefalsetruefalse16truetruetrue0.48890.4889falsefalsefalsetruefalse17truetruetrue0.51470.5147falsefalsefalsetruefalse18falsetruetrue00falsefalsefalsetruefalse19truetruetrue-0.0146-0.0146falsefalsefalsetruefalse20truetruetrue-0.0190-0.0190[1]falsefalsefalsetruefalse21truetruetrue-0.0094-0.0094[1]falsefalsefalsetruefalse22truetruetrue0.04890.0489falsefalsefalsetruefalse23falsetruetrue00falsefalsefalsetruefalse24truetruetrue0.19200.1920falsefalsefalsetruefalse25truetruetrue0.23880.2388falsefalsefalsetruefalse26truetruetrue0.15060.1506falsefalsefalsetruefalse27truetruetrue0.34750.3475falsefalsefalsetruefalse28truetruetrue0.15060.1506falsefalsefalsetruefalse29truetruetrue0.05190.0519falsefalsefalsetruefalse30truetruetrue0.15060.1506falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalsefalseUSDfalsefalse$2falseColumnprimaryElement*4false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.09850.0985falsefalsefalsetruefalse2truetruetrue0.08460.0846[1]falsefalsefalsetruefalse3truetruetrue0.07980.0798[1]falsefalsefalsetruefalse4truetruetrue0.10360.1036falsefalsefalsetruefalse5falsetruetrue00falsefalsefalsetruefalse6falsetruetrue00falsefalsefalsetruefalse7truetruetrue0.12330.1233falsefalsefalsetruefalse8truetruetrue0.11440.1144[1]falsefalsefalsetruefalse9truetruetrue0.10420.1042[1]falsefalsefalsetruefalse10truetruetrue0.12810.1281falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.25080.2508falsefalsefalsetruefalse14truetruetrue0.22070.2207[1]falsefalsefalsetruefalse15truetruetrue0.20560.2056[1]falsefalsefalsetruefalse16truetruetrue0.25650.2565falsefalsefalsetruefalse17falsetruetrue00falsefalsefalsetruefalse18falsetruetrue00falsefalsefalsetruefalse19falsetruetrue00falsefalsefalsetruefalse20falsetruetrue00falsefalsefalsetruefalse21falsetruetrue00falsefalsefalsetruefalse22falsetruetrue00falsefalsefalsetruefalse23falsetruetrue00falsefalsefalsetruefalse24truetruetrue0.13100.1310falsefalsefalsetruefalse25truetruetrue0.08980.0898falsefalsefalsetruefalse26truetruetrue0.02290.0229falsefalsefalsetruefalse27truetruetrue0.14650.1465falsefalsefalsetruefalse28truetruetrue0.02290.0229falsefalsefalsetruefalse29falsetruetrue00falsefalsefalsetruefalse30falsetruetrue00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalsefalseUSDfalsefalse$3falseColumnprimaryElement*5false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.09020.0902falsefalsefalsetruefalse2truetruetrue0.07910.0791[1]falsefalsefalsetruefalse3truetruetrue0.07480.0748[1]falsefalsefalsetruefalse4falsetruetrue00falsefalsefalsetruefalse5falsetruetrue00falsefalsefalsetruefalse6falsetruetrue00falsefalsefalsetruefalse7truetruetrue0.16350.1635falsefalsefalsetruefalse8truetruetrue0.15890.1589[1]falsefalsefalsetruefalse9truetruetrue0.14690.1469[1]falsefalsefalsetruefalse10truetruetrue0.16170.1617falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.28950.2895falsefalsefalsetruefalse14truetruetrue0.26260.2626[1]falsefalsefalsetruefalse15truetruetrue0.25070.2507[1]falsefalsefalsetruefalse16falsetruetrue00falsefalsefalsetruefalse17falsetruetrue00falsefalsefalsetruefalse18falsetruetrue00falsefalsefalsetruefalse19falsetruetrue00falsefalsefalsetruefalse20falsetruetrue00falsefalsefalsetruefalse21falsetruetrue00falsefalsefalsetruefalse22falsetruetrue00falsefalsefalsetruefalse23falsetruetrue00falsefalsefalsetruefalse24truetruetrue0.16210.1621falsefalsefalsetruefalse25truetruetrue0.09940.0994falsefalsefalsetruefalse26truetruetrue0.01410.0141falsefalsefalsetruefalse27falsetruetrue00falsefalsefalsetruefalse28truetruetrue0.01410.0141falsefalsefalsetruefalse29falsetruetrue00falsefalsefalsetruefalse30falsetruetrue00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn 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available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00falsefalsefalsetruefalse2falsetruetrue00&nbsp;[1]falsefalsefalsetruefalse3falsetruetrue00&nbsp;[1]falsefalsefalsetruefalse4truetruetrue0.15710.1571falsefalsefalsetruefalse5truetruetrue-0.0272-0.0272falsefalsefalsetruefalse6truetruetrue0.21480.2148falsefalsefalsetruefalse7falsetruetrue00falsefalsefalsetruefalse8falsetruetrue00&nbsp;[1]falsefalsefalsetruefalse9falsetruetrue00&nbsp;[1]falsefalsefalsetruefalse10falsetruetrue00falsefalsefalsetruefalse11truetruetrue0.10270.1027falsefalsefalsetruefalse12truetruetrue0.20470.2047falsefalsefalsetruefalse13falsetruetrue00falsefalsefalsetruefalse14falsetruetrue00&nbsp;[1]falsefalsefalsetruefalse15falsetruetrue00&nbsp;[1]falsefalsefalsetruefalse16truetruetrue0.24350.2435falsefalsefalsetruefalse17truetruetrue0.29980.2998falsefalsefalsetruefalse18truetruetrue0.32590.3259falsefalsefalsetruefalse19truetruetrue-0.0006-0.0006falsefalsefalsetruefalse20truetruetrue-0.0035-0.0035[1]falsefalsefalsetruefalse21truetruetrue-0.0021-0.0021[1]falsefalsefalsetruefalse22truetruetrue0.04040.0404falsefalsefalsetruefalse23truetruetrue0.03510.0351falsefalsefalsetruefalse24falsetruetrue00falsefalsefalsetruefalse25falsetruetrue00falsefalsefalsetruefalse26falsetruetrue00falsefalsefalsetruefalse27falsetruetrue00falsefalsefalsetruefalse28falsetruetrue00falsefalsefalsetruefalse29falsetruetrue00falsefalsefalsetruefalse30falsetruetrue00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn 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Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalsefalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009199MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000024994Memberrr_ProspectusShareClassAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberInternational Investors Gold FundClass ABefore 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Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088111Memberrr_ProspectusShareClassAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberInternational Investors Gold FundClass YBefore TaxesusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4truetruetrue0.32590.3259falsefalsefalsetruefalse5falsetruefalse002010-05-012010-05-01falsefalsetruetruefalseOthernanafalsefalse7falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009199MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberfalsefalseNYSE Arca Gold Miners Index (reflects no deduction for fees, expenses or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_NYSE_Arca_Gold_Miners_IndexMemberrr_PerformanceMeasureAxisexplicitMemberInternational Investors Gold FundShare ClassesNYSE Arca Gold Miners Index (reflects no deduction for fees, expenses or taxes)Standard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.34750.3475falsefalsefalsetruefalse2truetruetrue0.14650.1465falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalseOthernanafalsefalse8falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009199MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseInternational Investors Gold Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000009199Memberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberfalsefalseS&P® 500 Index (reflects no deduction for fees, expenses or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_SP_500_IndexMemberrr_PerformanceMeasureAxisexplicitMemberInternational Investors Gold FundShare ClassesS&P® 500 Index (reflects no deduction for fees, expenses or taxes)Standard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.15060.1506falsefalsefalsetruefalse2truetruetrue0.02290.0229falsefalsefalsetruefalse3truetruetrue0.01410.0141falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalseOthernanafalsefalse1After 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. These returns are shown for one class of shares only; after tax-returns for the other classes may vary. Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-deferred account, such as a 401(k) plan or Investment Retirement Account.58Average Annual Total Returns International Investors Gold FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000009199MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to PerformanceTableData.No authoritative reference available.falsefalse94false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturn1falsefalsefalse00Multi-Manager Alternatives FundMulti-Manager Alternatives Fundfalsefalsefalsefalsefalse4falsefalseUSDtruefalse{dei_LegalEntityAxis} : Multi-Manager Alternatives Fund 4/14/2011 - 4/14/2011 USD ($) $c27_S000024722Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalsecik0000768847_S000024722Memberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse96false0rr_RiskReturnHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00RISK/RETURNfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Investment Objectives/Goals Include the following information, in plain English under rule 421(d) under the Securities Act, in the order and subject matter indicatedReference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 falsefalse97false0rr_ObjectiveHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00INVESTMENT OBJECTIVEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse98false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Multi-Manager Alternatives Fund seeks to achieve consistent absolute (positive) returns in various market cycles.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse99false0rr_ExpenseHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00FUND FEES AND EXPENSESfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Fee Table Includes the following information, in plain English under rule 421(d) under the Securities Act, after Item 2 Fees and expenses of the Fund This table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Shareholder Fees (fees paid directly from your investment) Example 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 you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be You would pay the following expenses if you did not redeem your shares The Example does not reflect sales charges (loads) on reinvested dividends [and other distributions]. If these sales charges (loads) were included, your costs would be higher. Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. 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 __% of the average value of its whole portfolio. Instructions. A.3.instructions.6 New Funds. For purposes of this Item, a "New Fund" is a Fund that does not include in Form N-1A financial statements reporting operating results or that includes financial statements for the Fund's initial fiscal year reporting operating results for a period of 6 months or less. The following Instructions apply to New Funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph d -Subsection instructions falsefalse100false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the <b></b>Van Eck Funds. More information about these and other discounts is available from your financial professional and in the &#8220;Shareholder Information&#8221; section of the Fund&#8217;s prospectus and in the &#8220;Availability of Discounts&#8221; and &#8220;Breakpoint Linkage Rules for Discounts&#8221; sections of the Fund&#8217;s Statement of Additional Information (&#8220;SAI&#8221;).</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse101false0rr_ShareholderFeesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Shareholder Fees (fees paid directly from your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subsection table falsefalse102false0rr_ShareholderFeesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact cik0000768847_S000024722Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact cik0000768847_S000024722Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsehttp://xbrl.sec.gov/rr/role/ShareholderFeesDatafalsefalse020010 - Schedule - Shareholder Feestruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000024722MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000073442Memberrr_ProspectusShareClassAxisexplicitMemberMulti-Manager Alternatives FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000024722MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000073444Memberrr_ProspectusShareClassAxisexplicitMemberMulti-Manager Alternatives FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000024722MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088113Memberrr_ProspectusShareClassAxisexplicitMemberMulti-Manager Alternatives FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.05750.0575falsefalsefalsetruefalse6truetruetrue0.00000.0000falsefalsefalsetruefalse7truetruetrue0.00000.0000falsefalsefalsetruefalse8truetruetrue0.00000.0000falsefalsefalsetruefalse9truetruetrue0.05750.0575falsefalsefalsetruefalse10truetruetrue0.00000.0000falsefalsefalsetruefalse11truetruetrue0.00000.0000falsefalsefalsetruefalse12truetruetrue0.00000.0000falsefalsefalsetruefalse13truetruetrue0.05750.0575falsefalsefalsetruefalse14truetruetrue0.00000.0000falsefalsefalsetruefalse15truetruetrue0.00000.0000falsefalsefalsetruefalse16truetruetrue0.05750.0575falsefalsefalsetruefalse17truetruetrue0.00000.0000falsefalsefalsetruefalse18truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*4false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.00000.0000falsefalsefalsetruefalse6truetruetrue0.01000.0100falsefalsefalsetruefalse7truetruetrue0.00000.0000falsefalsefalsetruefalse8truetruetrue0.00000.0000falsefalsefalsetruefalse9truetruetrue0.00000.0000falsefalsefalsetruefalse10truetruetrue0.01000.0100falsefalsefalsetruefalse11truetruetrue0.00000.0000falsefalsefalsetruefalse12truetruetrue0.00000.0000falsefalsefalsetruefalse13truetruetrue0.00000.0000falsefalsefalsetruefalse14truetruetrue0.00000.0000falsefalsefalsetruefalse15truetruetrue0.00000.0000falsefalsefalsetruefalse16truetruetrue0.00000.0000falsefalsefalsetruefalse17truetruetrue0.00000.0000falsefalsefalsetruefalse18truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse0rr_MaximumDeferredSalesChargeOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse32Shareholder Fees Multi-Manager Alternatives FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000024722MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ShareholderFeesData.No authoritative reference available.falsefalse103false0rr_OperatingExpensesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 7 -Subsection table falsefalse104false0rr_AnnualFundOperatingExpensesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact cik0000768847_S000024722Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact cik0000768847_S000024722Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsehttp://xbrl.sec.gov/rr/role/OperatingExpensesDatafalsefalse020020 - Schedule - Annual Fund Operating Expensestruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000024722MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000073442Memberrr_ProspectusShareClassAxisexplicitMemberMulti-Manager Alternatives FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000024722MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000073444Memberrr_ProspectusShareClassAxisexplicitMemberMulti-Manager Alternatives FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000024722MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088113Memberrr_ProspectusShareClassAxisexplicitMemberMulti-Manager Alternatives FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00750.0075falsefalsefalsetruefalse2truetruetrue0.00750.0075falsefalsefalsetruefalse3truetruetrue0.00750.0075falsefalsefalsetruefalse4truetruetrue0.00750.0075falsefalsefalsetruefalse5truetruetrue0.00980.0098falsefalsefalsetruefalse6truetruetrue0.00980.0098falsefalsefalsetruefalse7truetruetrue0.00980.0098falsefalsefalsetruefalse8truetruetrue0.00980.0098falsefalsefalsetruefalse9truetruetrue0.00630.0063falsefalsefalsetruefalse10truetruetrue0.00630.0063falsefalsefalsetruefalse11truetruetrue0.00630.0063falsefalsefalsetruefalse12truetruetrue0.00630.0063falsefalsefalsetruefalse13truetruetrue0.01320.0132falsefalsefalsetruefalse14truetruetrue0.01320.0132falsefalsefalsetruefalse15truetruetrue0.01320.0132falsefalsefalsetruefalse16truetruetrue0.00750.0075falsefalsefalsetruefalse17truetruetrue0.00750.0075falsefalsefalsetruefalse18truetruetrue0.00750.0075falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse0rr_ManagementFeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01320.0132falsefalsefalsetruefalse2truetruetrue0.01320.0132falsefalsefalsetruefalse3truetruetrue0.01320.0132falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*4false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.00250.0025falsefalsefalsetruefalse6truetruetrue0.01000.0100falsefalsefalsetruefalse7truetruetrue0.00000.0000falsefalsefalsetruefalse8truetruetrue0.00000.0000falsefalsefalsetruefalse9truetruetrue0.00250.0025falsefalsefalsetruefalse10truetruetrue0.01000.0100falsefalsefalsetruefalse11truetruetrue0.00000.0000falsefalsefalsetruefalse12truetruetrue0.00000.0000falsefalsefalsetruefalse13truetruetrue0.00250.0025falsefalsefalsetruefalse14truetruetrue0.00000.0000falsefalsefalsetruefalse15truetruetrue0.00000.0000falsefalsefalsetruefalse16truetruetrue0.00250.0025falsefalsefalsetruefalse17truetruetrue0.00000.0000falsefalsefalsetruefalse18truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse0rr_DistributionAndService12b1FeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse3falseRowprimaryElement*5false0rr_Component1OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00falsefalsefalsetruefalse2falsetruetrue00falsefalsefalsetruefalse3falsetruetrue00falsefalsefalsetruefalse4falsetruetrue00falsefalsefalsetruefalse5falsetruetrue00falsefalsefalsetruefalse6falsetruetrue00falsefalsefalsetruefalse7falsetruetrue00falsefalsefalsetruefalse8falsetruetrue00falsefalsefalsetruefalse9falsetruetrue00falsefalsefalsetruefalse10falsetruetrue00falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.00270.0027falsefalsefalsetruefalse14truetruetrue0.00270.0027falsefalsefalsetruefalse15truetruetrue0.00300.0030falsefalsefalsetruefalse16falsetruetrue00falsefalsefalsetruefalse17falsetruetrue00falsefalsefalsetruefalse18falsetruetrue00falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureThe Fund may subdivide this caption into no more than three subcaptions that identify the largest expense or expenses comprising "Other Expenses," but must include a total of all "Other Expenses." Alternatively, the Fund may include the components of "Other Expenses" in a parenthetical to the caption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause iii -Subsection instructions falsefalse0rr_Component1OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00270.0027falsefalsefalsetruefalse2truetruetrue0.00270.0027falsefalsefalsetruefalse3truetruetrue0.00300.0030falsefalsefalsetruefalseOthernanafalsefalse4falseRowprimaryElement*6false0rr_Component2OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00falsefalsefalsetruefalse2falsetruetrue00falsefalsefalsetruefalse3falsetruetrue00falsefalsefalsetruefalse4falsetruetrue00falsefalsefalsetruefalse5falsetruetrue00falsefalsefalsetruefalse6falsetruetrue00falsefalsefalsetruefalse7falsetruetrue00falsefalsefalsetruefalse8falsetruetrue00falsefalsefalsetruefalse9falsetruetrue00falsefalsefalsetruefalse10falsetruetrue00falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.00750.0075falsefalsefalsetruefalse14truetruetrue0.00760.0076falsefalsefalsetruefalse15truetruetrue0.00660.0066falsefalsefalsetruefalse16falsetruetrue00falsefalsefalsetruefalse17falsetruetrue00falsefalsefalsetruefalse18falsetruetrue00falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureThe Fund may subdivide this caption into no more than three subcaptions that identify the largest expense or expenses comprising "Other Expenses," but must include a total of all "Other Expenses." Alternatively, the Fund may include the components of "Other Expenses" in a parenthetical to the caption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 10 -Subsection table falsefalse0rr_Component2OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00750.0075falsefalsefalsetruefalse2truetruetrue0.00760.0076falsefalsefalsetruefalse3truetruetrue0.00660.0066falsefalsefalsetruefalseOthernanafalsefalse5falseRowprimaryElement*8false0rr_AcquiredFundFeesAndExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00falsefalsefalsetruefalse2falsetruetrue00falsefalsefalsetruefalse3falsetruetrue00falsefalsefalsetruefalse4falsetruetrue00falsefalsefalsetruefalse5truetruetrue0.00010.0001falsefalsefalsetruefalse6truetruetrue0.00010.0001falsefalsefalsetruefalse7truetruetrue0.00010.0001falsefalsefalsetruefalse8truetruetrue0.00010.0001falsefalsefalsetruefalse9truetruetrue0.00010.0001falsefalsefalsetruefalse10truetruetrue0.00010.0001falsefalsefalsetruefalse11truetruetrue0.00010.0001falsefalsefalsetruefalse12truetruetrue0.00010.0001falsefalsefalsetruefalse13truetruetrue0.00780.0078falsefalsefalsetruefalse14truetruetrue0.00780.0078falsefalsefalsetruefalse15truetruetrue0.00780.0078falsefalsefalsetruefalse16falsetruetrue00falsefalsefalsetruefalse17falsetruetrue00falsefalsefalsetruefalse18falsetruetrue00falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse0rr_AcquiredFundFeesAndExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00780.0078falsefalsefalsetruefalse2truetruetrue0.00780.0078falsefalsefalsetruefalse3truetruetrue0.00780.0078falsefalsefalsetruefalseOthernanafalsefalse6falseRowprimaryElement*9false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01740.0174falsefalsefalsetruefalse2truetruetrue0.02610.0261falsefalsefalsetruefalse3truetruetrue0.02230.0223falsefalsefalsetruefalse4truetruetrue0.01730.0173falsefalsefalsetruefalse5truetruetrue0.01430.0143falsefalsefalsetruefalse6truetruetrue0.02160.0216falsefalsefalsetruefalse7truetruetrue0.01050.0105falsefalsefalsetruefalse8truetruetrue0.01100.0110falsefalsefalsetruefalse9truetruetrue0.01250.0125falsefalsefalsetruefalse10truetruetrue0.01950.0195falsefalsefalsetruefalse11truetruetrue0.01010.0101falsefalsefalsetruefalse12truetruetrue0.01110.0111falsefalsefalsetruefalse13truetruetrue0.03370.0337falsefalsefalsetruefalse14truetruetrue0.03130.0313falsefalsefalsetruefalse15truetruetrue0.03060.0306falsefalsefalsetruefalse16truetruetrue0.01520.0152falsefalsefalsetruefalse17truetruetrue0.00980.0098falsefalsefalsetruefalse18truetruetrue0.01270.0127falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse0rr_ExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.03370.0337falsefalsefalsetruefalse2truetruetrue0.03130.0313falsefalsefalsetruefalse3truetruetrue0.03060.0306falsefalsefalsetruefalseOthernanafalsefalse7falseRowprimaryElement*10false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000[4]falsefalsefalsetruefalse2truetruetrue-0.0011-0.0011[4]falsefalsefalsetruefalse3truetruetrue-0.0098-0.0098[4]falsefalsefalsetruefalse4truetruetrue-0.0003-0.0003[4]falsefalsefalsetruefalse5truetruetrue-0.0004-0.0004[3]falsefalsefalsetruefalse6truetruetrue0.00000.0000[3]falsefalsefalsetruefalse7truetruetrue-0.0004-0.0004[3]falsefalsefalsetruefalse8truetruetrue0.00000.0000[3]falsefalsefalsetruefalse9falsetruetrue00falsefalsefalsetruefalse10falsetruetrue00falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.00000.0000[5]falsefalsefalsetruefalse14truetruetrue-0.0013-0.0013[5]falsefalsefalsetruefalse15truetruetrue0.00000.0000[5]falsefalsefalsetruefalse16truetruetrue-0.0057-0.0057[2]falsefalsefalsetruefalse17truetruetrue-0.0033-0.0033[2]falsefalsefalsetruefalse18truetruetrue-0.0057-0.0057[2]falsefalsefalsetruefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse0rr_FeeWaiverOrReimbursementOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1truetruetrue0.00000.0000falsefalsefalsetruefalse2truetruetrue-0.0013-0.0013falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse8falseRowprimaryElement*11false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01740.0174falsefalsefalsetruefalse2truetruetrue0.02500.0250falsefalsefalsetruefalse3truetruetrue0.01250.0125falsefalsefalsetruefalse4truetruetrue0.01700.0170falsefalsefalsetruefalse5truetruetrue0.01390.0139falsefalsefalsetruefalse6truetruetrue0.02160.0216falsefalsefalsetruefalse7truetruetrue0.01010.0101falsefalsefalsetruefalse8truetruetrue0.01100.0110falsefalsefalsetruefalse9falsetruetrue00falsefalsefalsetruefalse10falsetruetrue00falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.03370.0337falsefalsefalsetruefalse14truetruetrue0.03000.0300falsefalsefalsetruefalse15truetruetrue0.03060.0306falsefalsefalsetruefalse16truetruetrue0.00950.0095falsefalsefalsetruefalse17truetruetrue0.00650.0065falsefalsefalsetruefalse18truetruetrue0.00700.0070falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse0rr_NetExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.03370.0337falsefalsefalsetruefalse2truetruetrue0.03000.0300falsefalsefalsetruefalse3truetruetrue0.03060.0306falsefalsefalsetruefalseOthernanafalsefalse1Van Eck Associates Corporation (the "Adviser") has agreed to waive fees and/or pay Fund expenses to the extent necessary to prevent the operating expenses of the Fund (excluding acquired fund fees and expenses, interest expense, trading expenses, dividends on securities sold short, taxes and extraordinary expenses) from exceeding 2.40% for Class A, 1.95% for Class I, and 2.00% for Class Y of the Fund's average daily net assets per year until May 1, 2012. During such time, the expense limitation is expected to continue until the Board of Trustees acts to discontinue all or a portion of such expense limitation.38Annual Fund Operating Expenses Multi-Manager Alternatives FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000024722MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to OperatingExpensesData.No authoritative reference available.falsefalse105false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Expense ExamplefalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse106false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following 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 either redeem all of your shares at the end of these periods or continue to hold them. The example also assumes that your investment has a 5% return each year and that the Fund&#8217;s operating expenses remain the same. Although your actual expenses may be higher or lower, based on these assumptions, your costs would be:</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThe Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection example falsefalse107false0rr_ExpenseExampleByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Sold falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse108false0rr_ExpenseExampleWithRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact cik0000768847_S000024722Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact cik0000768847_S000024722Member column rr_ProspectusShareClassAxis compact * row primary compact * ~truehttp://xbrl.sec.gov/rr/role/ExpenseExamplefalsefalse020030 - Schedule - Expense Example {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue742742falsefalsefalsetruefalse2truefalsetrue353353falsefalsefalsetruefalse3truefalsetrue127127falsefalsefalsetruefalse4truefalsetrue173173falsefalsefalsetruefalse5truefalsetrue708708falsefalsefalsetruefalse6truefalsetrue319319falsefalsefalsetruefalse7truefalsetrue103103falsefalsefalsetruefalse8truefalsetrue112112falsefalsefalsetruefalse9truefalsetrue695695falsefalsefalsetruefalse10truefalsetrue298298falsefalsefalsetruefalse11truefalsetrue103103falsefalsefalsetruefalse12truefalsetrue113113falsefalsefalsetruefalse13truefalsetrue340340falsefalsefalsetruefalse14truefalsetrue303303falsefalsefalsetruefalse15truefalsetrue309309falsefalsefalsetruefalse16truefalsetrue666666falsefalsefalsetruefalse17truefalsetrue6666falsefalsefalsetruefalse18truefalsetrue7272falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalsefalseUSDfalsefalse$2falseColumnprimaryElement*4false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue10911091falsefalsefalsetruefalse2truefalsetrue801801falsefalsefalsetruefalse3truefalsetrue603603falsefalsefalsetruefalse4truefalsetrue542542falsefalsefalsetruefalse5truefalsetrue998998falsefalsefalsetruefalse6truefalsetrue676676falsefalsefalsetruefalse7truefalsetrue330330falsefalsefalsetruefalse8truefalsetrue350350falsefalsefalsetruefalse9truefalsetrue949949falsefalsefalsetruefalse10truefalsetrue612612falsefalsefalsetruefalse11truefalsetrue322322falsefalsefalsetruefalse12truefalsetrue353353falsefalsefalsetruefalse13truefalsetrue10361036falsefalsefalsetruefalse14truefalsetrue954954falsefalsefalsetruefalse15truefalsetrue945945falsefalsefalsetruefalse16truefalsetrue975975falsefalsefalsetruefalse17truefalsetrue279279falsefalsefalsetruefalse18truefalsetrue346346falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalseUSDfalsefalse$3falseColumnprimaryElement*5false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue14641464falsefalsefalsetruefalse2truefalsetrue13751375falsefalsefalsetruefalse3truefalsetrue11051105falsefalsefalsetruefalse4truefalsetrue936936falsefalsefalsetruefalse5truefalsetrue13081308falsefalsefalsetruefalse6truefalsetrue11591159falsefalsefalsetruefalse7truefalsetrue575575falsefalsefalsetruefalse8truefalsetrue606606falsefalsefalsetruefalse9truefalsetrue12221222falsefalsefalsetruefalse10truefalsetrue10521052falsefalsefalsetruefalse11truefalsetrue558558falsefalsefalsetruefalse12truefalsetrue612612falsefalsefalsetruefalse13truefalsetrue17551755falsefalsefalsetruefalse14truefalsetrue16291629falsefalsefalsetruefalse15truefalsetrue16061606falsefalsefalsetruefalse16falsefalsetrue00falsefalsefalsetruefalse17falsefalsetrue00falsefalsefalsetruefalse18falsefalsetrue00falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalseUSDfalsefalse$4falseColumnprimaryElement*6false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue25092509falsefalsefalsetruefalse2truefalsetrue29362936falsefalsefalsetruefalse3truefalsetrue24882488falsefalsefalsetruefalse4truefalsetrue20382038falsefalsefalsetruefalse5truefalsetrue21862186falsefalsefalsetruefalse6truefalsetrue24932493falsefalsefalsetruefalse7truefalsetrue12791279falsefalsefalsetruefalse8truefalsetrue13401340falsefalsefalsetruefalse9truefalsetrue19991999falsefalsefalsetruefalse10truefalsetrue22752275falsefalsefalsetruefalse11truefalsetrue12361236falsefalsefalsetruefalse12truefalsetrue13521352falsefalsefalsetruefalse13truefalsetrue36583658falsefalsefalsetruefalse14truefalsetrue34303430falsefalsefalsetruefalse15truefalsetrue33743374falsefalsefalsetruefalse16falsefalsetrue00falsefalsefalsetruefalse17falsefalsetrue00falsefalsefalsetruefalse18falsefalsetrue00falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000024722MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000073442Memberrr_ProspectusShareClassAxisexplicitMemberMulti-Manager Alternatives FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue340340falsefalsefalsetruefalse2truefalsetrue10361036falsefalsefalsetruefalse3truefalsetrue17551755falsefalsefalsetruefalse4truefalsetrue36583658falsefalsefalsetruefalseOthernanafalsefalse2falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000024722MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000073444Memberrr_ProspectusShareClassAxisexplicitMemberMulti-Manager Alternatives FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue303303falsefalsefalsetruefalse2truefalsetrue954954falsefalsefalsetruefalse3truefalsetrue16291629falsefalsefalsetruefalse4truefalsetrue34303430falsefalsefalsetruefalseOthernanafalsefalse3falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000024722MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088113Memberrr_ProspectusShareClassAxisexplicitMemberMulti-Manager Alternatives FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue309309falsefalsefalsetruefalse2truefalsetrue945945falsefalsefalsetruefalse3truefalsetrue16061606falsefalsefalsetruefalse4truefalsetrue33743374falsefalsefalsetruefalseOthernanafalsefalse43Expense Example Multi-Manager Alternatives Fund (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000024722MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExample.No authoritative reference available.falsefalse109false0rr_ExpenseExampleNoRedemptionByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00HeldfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse110false0rr_ExpenseExampleNoRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption column dei_LegalEntityAxis compact cik0000768847_S000024722Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption column dei_LegalEntityAxis compact cik0000768847_S000024722Member column rr_ProspectusShareClassAxis compact * row primary compact * ~truehttp://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemptionfalsefalse020040 - Schedule - Expense Example, No Redemption {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue742742falsefalsefalsetruefalse2truefalsetrue253253falsefalsefalsetruefalse3truefalsetrue127127falsefalsefalsetruefalse4truefalsetrue173173falsefalsefalsetruefalse5truefalsetrue708708falsefalsefalsetruefalse6truefalsetrue219219falsefalsefalsetruefalse7truefalsetrue103103falsefalsefalsetruefalse8truefalsetrue112112falsefalsefalsetruefalse9truefalsetrue695695falsefalsefalsetruefalse10truefalsetrue198198falsefalsefalsetruefalse11truefalsetrue103103falsefalsefalsetruefalse12truefalsetrue113113falsefalsefalsetruefalse13truefalsetrue340340falsefalsefalsetruefalse14truefalsetrue303303falsefalsefalsetruefalse15truefalsetrue309309falsefalsefalsetruefalse16truefalsetrue666666falsefalsefalsetruefalse17truefalsetrue6666falsefalsefalsetruefalse18truefalsetrue7272falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalsefalseUSDfalsefalse$2falseColumnprimaryElement*4false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue10911091falsefalsefalsetruefalse2truefalsetrue801801falsefalsefalsetruefalse3truefalsetrue603603falsefalsefalsetruefalse4truefalsetrue542542falsefalsefalsetruefalse5truefalsetrue998998falsefalsefalsetruefalse6truefalsetrue676676falsefalsefalsetruefalse7truefalsetrue330330falsefalsefalsetruefalse8truefalsetrue350350falsefalsefalsetruefalse9truefalsetrue949949falsefalsefalsetruefalse10truefalsetrue612612falsefalsefalsetruefalse11truefalsetrue322322falsefalsefalsetruefalse12truefalsetrue353353falsefalsefalsetruefalse13truefalsetrue10361036falsefalsefalsetruefalse14truefalsetrue954954falsefalsefalsetruefalse15truefalsetrue945945falsefalsefalsetruefalse16truefalsetrue975975falsefalsefalsetruefalse17truefalsetrue279279falsefalsefalsetruefalse18truefalsetrue346346falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalsefalseUSDfalsefalse$3falseColumnprimaryElement*5false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue14641464falsefalsefalsetruefalse2truefalsetrue13751375falsefalsefalsetruefalse3truefalsetrue11051105falsefalsefalsetruefalse4truefalsetrue936936falsefalsefalsetruefalse5truefalsetrue13081308falsefalsefalsetruefalse6truefalsetrue11591159falsefalsefalsetruefalse7truefalsetrue575575falsefalsefalsetruefalse8truefalsetrue606606falsefalsefalsetruefalse9truefalsetrue12221222falsefalsefalsetruefalse10truefalsetrue10521052falsefalsefalsetruefalse11truefalsetrue558558falsefalsefalsetruefalse12truefalsetrue612612falsefalsefalsetruefalse13truefalsetrue17551755falsefalsefalsetruefalse14truefalsetrue16291629falsefalsefalsetruefalse15truefalsetrue16061606falsefalsefalsetruefalse16falsefalsetrue00falsefalsefalsetruefalse17falsefalsetrue00falsefalsefalsetruefalse18falsefalsetrue00falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalsefalseUSDfalsefalse$4falseColumnprimaryElement*6false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue25092509falsefalsefalsetruefalse2truefalsetrue29362936falsefalsefalsetruefalse3truefalsetrue24882488falsefalsefalsetruefalse4truefalsetrue20382038falsefalsefalsetruefalse5truefalsetrue21862186falsefalsefalsetruefalse6truefalsetrue24932493falsefalsefalsetruefalse7truefalsetrue12791279falsefalsefalsetruefalse8truefalsetrue13401340falsefalsefalsetruefalse9truefalsetrue19991999falsefalsefalsetruefalse10truefalsetrue22752275falsefalsefalsetruefalse11truefalsetrue12361236falsefalsefalsetruefalse12truefalsetrue13521352falsefalsefalsetruefalse13truefalsetrue36583658falsefalsefalsetruefalse14truefalsetrue34303430falsefalsefalsetruefalse15truefalsetrue33743374falsefalsefalsetruefalse16falsefalsetrue00falsefalsefalsetruefalse17falsefalsetrue00falsefalsefalsetruefalse18falsefalsetrue00falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalsefalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000024722MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000073442Memberrr_ProspectusShareClassAxisexplicitMemberMulti-Manager Alternatives FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue340340falsefalsefalsetruefalse2truefalsetrue10361036falsefalsefalsetruefalse3truefalsetrue17551755falsefalsefalsetruefalse4truefalsetrue36583658falsefalsefalsetruefalseOthernanafalsefalse2falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000024722MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000073444Memberrr_ProspectusShareClassAxisexplicitMemberMulti-Manager Alternatives FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue303303falsefalsefalsetruefalse2truefalsetrue954954falsefalsefalsetruefalse3truefalsetrue16291629falsefalsefalsetruefalse4truefalsetrue34303430falsefalsefalsetruefalseOthernanafalsefalse3falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000024722MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseMulti-Manager Alternatives Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000024722Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000088113Memberrr_ProspectusShareClassAxisexplicitMemberMulti-Manager Alternatives FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue309309falsefalsefalsetruefalse2truefalsetrue945945falsefalsefalsetruefalse3truefalsetrue16061606falsefalsefalsetruefalse4truefalsetrue33743374falsefalsefalsetruefalseOthernanafalsefalse43Expense Example, No Redemption Multi-Manager Alternatives Fund (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000024722MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExampleNoRedemption.No authoritative reference available.falsefalse111false0rr_PortfolioTurnoverHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PORTFOLIO TURNOVERfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 5 -Subsection instructions falsefalse112false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 275% of the average value of its portfolio.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalse113false0rr_StrategyHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL INVESTMENT STRATEGIESfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse114false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund pursues its objective by allocating its assets among (i) investment sub-advisers (the &#8220;Sub-Advisers&#8221;, also referred to as &#8220;managers&#8221;) with experience in managing alternative or non-traditional investment strategies, and (ii) affiliated and unaffiliated funds, including open end and closed end funds and exchange-traded funds (&#8220;ETFs&#8221;), which employ a variety of investment strategies (collectively, the &#8220;Underlying Funds&#8221;). The Fund is considered to be &#8220;non-diversified&#8221; which means that it may invest in fewer securities than a &#8220;diversified&#8221; fund.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The main strategies that may be employed by the Sub-Advisers and the Underlying Funds include:</font></p> <p style="margin:3.5mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm; color:#003aa8;"><i>DIRECTIONAL AND TACTICAL STRATEGIES</i></font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Directional and tactical strategies seek to exploit broad market trends in equities, interest rates or commodity prices. These strategies may include:</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Long/Short Equity:</b> A long/short strategy seeks to invest in securities believed to be undervalued or offer high growth opportunities while also attempting to reduce overall market risk or take advantage of an anticipated decline in the price of an overvalued company or index by using short sales or options on common stocks or indexes to hedge risk. This strategy may also use derivatives, including options, financial futures and options on futures. Long and short positions may not be invested in equal dollars and, as such, may not seek to neutralize general market risks.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Long-Only:</b> A long-only strategy seeks to invest in stocks that are believed to have appreciation potential. This strategy may concentrate in certain markets, industries or geographical areas. This strategy is primarily managed for absolute return and to assess risk and opportunity on an absolute, not an index-relative basis.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Short-Only:</b> A short-only strategy seeks to identify securities that are expected to depreciate in value. In a short sale, the Fund borrows an equity security from a broker, and then sells it. If the value of the security goes down, the Fund can buy it back in the market and return it to the broker, making a profit. This strategy may be employed to hedge or offset long-only equity strategies of similar size in assets and volatility.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Long/Short Credit &amp; Fixed Income:</b> A long/short credit strategy combines long and short positions in debt securities of domestic and foreign governments, agencies, and companies of all maturities and qualities, including high yield (junk bonds) and Treasury Inflation-Protected Securities (&#8220;TIPS&#8221;), ETFs and emerging market debt. This strategy may invest in mortgage-backed securities, collateralized mortgage obligations, asset-backed securities and other mortgage related securities. The strategy may focus on short positions by utilizing instruments to anticipate the decline in the price of an overvalued security or type of security. Such hedging instruments could include individual bonds or related stocks, futures contracts or other instruments.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Global Macro and Emerging Markets:</b> A global macro and emerging markets strategy seek to profit from directional changes in currencies, stock markets, commodity prices and market volatility. This strategy may utilize positions held through individual securities, ETFs, derivative contracts, swaps or other financial instruments linked to major market, sector or country indices, fixed income securities, currencies and commodities. This strategy may invest in a limited number of securities, issuers, industries or countries which may result in higher volatility.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Managed Futures:</b> A managed futures strategy seeks to preserve capital through capturing opportunities in various futures markets. This strategy typically includes long positions in the futures that are showing strong upward momentum and short positions in the futures that are in a downward trend. This strategy may provide different exposures to many markets and thus offer low correlations with traditional stock and bond markets.</font></p> <p style="margin:3.5mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm; color:#003aa8;"><i>EVENT-DRIVEN STRATEGIES</i></font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Event-driven strategies seek to benefit from price movements caused by anticipated corporate events, such as mergers, acquisitions, spin-offs or other special situations. These strategies may include:</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Distressed Securities:</b> Investing in the securities of issuers in financial distress based upon the expectations of the manager as to whether a turnaround may materialize.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Special Situations:</b> Investing in the securities of issuers based upon the expectations of the manager as to whether the price of such securities may change in the short term due to a special situation, such as a stock buy-back, spin-off, bond upgrade or a positive earnings report.</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Merger Arbitrage:</b> Seeking to exploit price differentials in the shares of companies that are involved in announced corporate events, such as mergers, by assessing the likelihood that such events will be consummated as proposed.</font></p> <p style="margin:3.5mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm; color:#003aa8;"><i>ARBITRAGE STRATEGIES</i></font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Arbitrage strategies seek to exploit price differences in identical, related or similar securities on different markets or in different forms so as to minimize overall market risk. These strategies may include:</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Fixed Income or Interest Rate Arbitrage:</b> Buying and shorting different debt securities and/or futures contracts, including interest rate swap arbitrage, U.S. and non-U.S. bond arbitrage.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Convertible Arbitrage:</b> Seeking to exploit price differentials in the convertible bond markets by buying the convertible bond, and shorting the common stock, of the same company.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Pairs Trading:</b> Certain securities, often competitors in the same sector, are sometimes correlated in their day-to-day price movements. If the performance link breaks down, <i>i.e.</i>, one stock trades up while the other traded down, a manager may sell the outperforming stock and buy the underperforming one, based on the assumption that the &#8220;spread&#8221; between the two would eventually converge. This may help to hedge against market and sector risk.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Equity Market Neutral:</b> A market neutral strategy combines long and short equity positions to seek to keep its exposure to overall market risk very low. Such strategies take long positions in those securities believed to have attractive appreciation potential and short positions in those securities believed to have depreciation potential. 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This is referred to as &#8220;low correlation.&#8221; The degree of correlation of any given investment strategy of a Sub-Adviser or an Underlying Fund will, with other investment strategies and the market as a whole, vary as a result of market conditions and other factors, and some Sub-Advisers and Underlying Funds will have a greater degree of correlation with each other and with the market than others.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">By allocating its assets among a number of investment options, the Fund seeks to achieve diversification, less risk and lower volatility than if the Fund utilized a single manager or a single strategy approach. The Fund is not required to invest with any minimum number of Sub-Advisers or Underlying Funds, and does not have minimum or maximum limitations with respect to allocations of assets to any Sub-Adviser, investment strategy or market sector. The Adviser may change the allocation of the Fund&#8217;s assets among the available investment options, and may add or remove Sub-Advisers, at any time. For a variety of reasons, including capacity and regulatory limitations, not all the Sub-Advisers may be available to the Fund if it chooses to use them in the future.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Each Sub-Adviser is responsible for the day-to-day management of its allocated portion of Fund assets. 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The Fund may invest in Underlying Funds in excess of the limitations under the Investment Company Act of 1940, as amended (the &#8220;1940 Act&#8221;), pursuant to either an exemptive order obtained by the Fund and the Adviser from the SEC or an exemptive order obtained by an Underlying Fund from the SEC and consistent with the conditions specified in such order.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Investments in the securities of Underlying Funds involve duplication of advisory fees and certain other expenses. By investing in an Underlying Fund, the Fund becomes a shareholder of that Underlying Fund. As a result, the Fund&#8217;s shareholders will indirectly bear the Fund&#8217;s proportionate share of the fees and expenses paid by shareholders of the Underlying Fund, in addition to the fees and expenses the Fund&#8217;s shareholders directly bear in connection with the Fund&#8217;s own operations. To minimize the duplication of fees, the Adviser has agreed to waive the management fee it charges to the Fund by any amount it collects as a management fee from an Underlying Fund managed by the Adviser, as a result of an investment of the Fund&#8217;s assets in such Underlying Fund.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">In addition to Sub-Advisers and Underlying Funds, the Fund may invest indirectly in strategies or managers through securities, funds, notes, certificates, options, swaps or other derivative instruments, including instruments indexed to baskets of underlying funds.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund&#8217;s assets will be primarily invested in common stock, convertible or non-convertible preferred stock, and fixed-income securities of U.S. and foreign governments, semi-government, their agencies and instrumentalities, non-governmental organizations, supra-national organizations and companies, including those in or that have operations in emerging markets.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may invest in foreign securities, depositary receipts and shares relating to foreign securities. The Fund may also invest in rights, warrants, forward, futures and options contracts and other derivative securities; and enter into equity, interest rate, index and currency rate swap agreements.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">In addition, the Fund may invest in funds that seek to track investable hedge fund indices; directly and indirectly in commodities; make direct investments in equity interests in trusts, partnerships, joint ventures and other unincorporated entities or enterprises; and invest in securities of companies in initial public offerings.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">A portion of the Fund&#8217;s assets may be invested in cash, cash equivalents, or in money market funds.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse115false0rr_RiskHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL RISKSfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subsection b falsefalse116false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">There is no assurance that the Fund will achieve its investment objective. The Fund&#8217;s share price and return will fluctuate with changes in the market value of the Fund&#8217;s portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund uses one or more investment strategies in seeking its investment objective. Such strategies may involve investing in a variety of different instruments and using certain techniques that are subject to the risks set forth below.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Arbitrage Trading.</b> The underlying relationships between securities in which the Fund takes investment positions may change in an adverse manner, in which case the Fund may realize losses.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Below Investment Grade Securities.</b> Below investment grade securities (sometimes referred to as &#8220;junk bonds&#8221;) are more speculative than higher-rated securities. These securities have a much greater risk of default and may be more volatile than higher-rated securities of similar maturity. These securities may be less liquid and more difficult to value than higher-rated securities.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Convertible Securities.</b> Convertible securities are subject to the usual risks associated with debt securities, such as interest rate risk and credit risk. Convertible securities also react to changes in the value of the common stock into which they convert, and are thus subject to market risk. The Fund may be forced to convert a convertible security before it otherwise would choose to do so, which may decrease the Fund&#8217;s return.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Debt Securities.</b> Debt securities are subject to credit risk and interest rate risk. Credit risk refers to the possibility that the issuer of a debt security will be unable to make interest payments or repay principal when it becomes due. Interest rate risk refers to fluctuations in the value of a debt security resulting from changes in the general level of interest rates.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Derivatives.</b> The use of derivatives, such as swap agreements, options, warrants, futures contracts, currency forwards and structured notes, presents risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. The use of derivatives can lead to losses because of adverse movements in the price or value of the underlying security, asset, index or reference rate. Derivative strategies often involve leverage, which may exaggerate a loss, potentially causing the Fund to lose more money than it would have lost had it invested in the underlying security. Also, a liquid secondary market may not always exist for the Fund&#8217;s derivative positions at times when the Fund might wish to terminate or sell such positions and over the counter instruments may be illiquid.</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Directional and Tactical Trading.</b> Directional and tactical trading involves the risk that the investment decisions made by the Sub-Adviser in using this strategy may prove to be incorrect, may not produce the returns expected by the Sub-Adviser and may cause the Fund&#8217;s shares to lose value.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Emerging Markets Securities.</b> Emerging markets securities typically present even greater exposure to the risks described under &#8220;Foreign Securities&#8221; and may be particularly sensitive to certain economic changes. Emerging markets securities are exposed to a number of risks that may make these investments volatile in price or difficult to trade.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Event-Driven Trading.</b> Event-driven trading involves the risk that the special situation may not occur as anticipated and that this has a negative impact upon the market price of a stock.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Foreign Securities.</b> Foreign investments are subject to greater risks than U.S. domestic investments. These additional risks may include exchange rate fluctuations and exchange controls; less publicly available information; more volatile or less liquid securities markets; and the possibility of arbitrary action by foreign governments, or political, economic or social instability. Foreign companies also may be subject to significantly higher levels of taxation than U.S. companies, including potentially confiscatory levels of taxation, thereby reducing the earnings potential of such foreign companies.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Investments in Underlying Funds.</b> The Fund&#8217;s investment in an Underlying Fund may subject the Fund indirectly to the underlying risks of the investment company. The Fund also will bear its share of the Underlying Fund&#8217;s fees and expenses, which are in addition to the Fund&#8217;s own fees and expenses.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Market.</b> Market risk refers to the risk that the market prices of securities that the Fund holds will rise or fall, sometimes rapidly or unpredictably. In general, equity securities tend to have greater price volatility than debt securities.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Mortgage- and Asset-Backed Securities.</b> The value of the Fund&#8217;s mortgage- and asset-backed securities may be affected by, among other things, changes in: interest rates, the creditworthiness of the entities that provide credit enhancements, or the market&#8217;s assessment of the quality of underlying assets. Mortgage- and asset-backed securities are subject to prepayment risk, which is the possibility that the underlying debt may be refinanced or prepaid prior to maturity. In addition, rising or high interest rates tend to extend the duration of mortgage- and asset-backed securities, making them more volatile and more sensitive to changes in interest rates.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Multiple Investment Sub-Advisers.</b> The Sub-Advisers make their trading decisions independently, and, as a result, it is possible that one or more Sub-Advisers may take positions in the same security or purchase/sell the same security at the same time without aggregating their transactions. This may cause unnecessary brokerage and other expenses to the Fund. Each Sub-Adviser uses a particular style or set of styles to select investments for the Fund. Those styles may be out of favor or may not produce the best results over the investment time periods.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Non-Diversification.</b> A non-diversified fund&#8217;s greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund&#8217;s portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Preferred Stocks.</b> Unlike interest payments on debt securities, dividend payments on a preferred stock typically must be declared by the issuer&#8217;s board of directors. In addition, in the event an issuer of preferred stock experiences economic difficulties, the issuer&#8217;s preferred stock may lose substantial value due to the reduced likelihood that the issuer&#8217;s board of directors will declare a dividend and the fact that the preferred stock may be subordinated to other securities of the same issuer.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Repurchase Agreements.</b> A repurchase agreement exposes the Fund to the risk that the party that sells the security may default on its obligation to repurchase it. The Fund may lose money if it cannot sell the security at the agreed-upon time and price or the security loses value before it can be sold.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Short Sales.</b> If the Fund sells a stock short and subsequently has to buy the security back at a higher price, the Fund will lose money on the transaction. Any loss will be increased by the amount of compensation, interest or dividends and transaction costs the Fund must pay to a lender of the security. The amount the Fund could lose on a short sale is theoretically unlimited (as compared to a long position, where the maximum loss is the amount invested). The use of short sales, which has the effect of leveraging the Fund, could increase the exposure of the Fund to the market, increase losses and increase the volatility of returns.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund may not always be able to close out a short position at a particular time or at an acceptable price. A lender may request that borrowed securities be returned to it on short notice, and the Fund may have to buy the borrowed securities at an unfavorable price. If this occurs at a time that other short sellers of the same security also want to close out their positions, it is more likely that the Fund will have to cover its short sale at an unfavorable price and potentially reduce or eliminate any gain, or cause a loss, as a result of the short sale.</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Sub-Adviser Allocation.</b> The success of the Fund&#8217;s investment strategy depends on, among other things, both the Adviser&#8217;s skill in selecting Sub-Advisers and allocating assets to those Sub-Advisers and on a Sub-Adviser&#8217;s skill in executing the relevant strategy and selecting investments for the Fund.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringNarrative Risk Disclosure. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Clause instruction -Subsection b falsefalse117false0rr_BarChartAndPerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PERFORMANCEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse118false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund&#8217;s performance from year to year and by showing how the Fund&#8217;s average annual total returns compare with those of a broad measure of market performance and one or more other performance measures. For instance, the HFRX Global Hedge Fund Index is designed to be representative of the overall composition of the hedge fund universe and is comprised of eight strategies: convertible arbitrage, distressed securities, equity hedge, equity market neutral, event driven, macro, merger arbitrage, and relative value arbitrage. The strategies are asset weighted in the index based on the distribution of assets in the hedge fund industry. The Fund&#8217;s past performance is not necessarily an indication of how the Fund will perform in the future. The annual returns in the bar chart are for the Fund&#8217;s Class A shares and do not reflect sales loads. 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These returns are shown for one class of shares only; after tax-returns for the other classes may vary. Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-deferred account, such as a 401(k) plan or Investment Retirement Account.37Average Annual Total Returns Multi-Manager Alternatives FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000024722MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to PerformanceTableData.No authoritative reference available.falsefalse125false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturn1falsefalsefalse00Van Eck CM Commodity Index FundVan Eck CM Commodity Index Fundfalsefalsefalsefalsefalse5falsefalseUSDtruefalse{dei_LegalEntityAxis} : Van Eck CM Commodity Index Fund 4/14/2011 - 4/14/2011 USD ($) $c35_S000029608Memberhttp://www.sec.gov/CIK0000768847duration2011-04-14T00:00:002011-04-14T00:00:00falsefalsecik0000768847_S000029608Memberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000029608Memberdei_LegalEntityAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse127false0rr_RiskReturnHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00RISK/RETURNfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Investment Objectives/Goals Include the following information, in plain English under rule 421(d) under the Securities Act, in the order and subject matter indicatedReference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 falsefalse128false0rr_ObjectiveHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00INVESTMENT OBJECTIVEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse129false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The CM Commodity Index Fund seeks to track, before fees and expenses, the performance of the UBS Bloomberg Constant Maturity Commodity Total Return Index.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse130false0rr_ExpenseHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00FUND FEES AND EXPENSESfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Fee Table Includes the following information, in plain English under rule 421(d) under the Securities Act, after Item 2 Fees and expenses of the Fund This table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Shareholder Fees (fees paid directly from your investment) Example 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 you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be You would pay the following expenses if you did not redeem your shares The Example does not reflect sales charges (loads) on reinvested dividends [and other distributions]. If these sales charges (loads) were included, your costs would be higher. Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. 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 __% of the average value of its whole portfolio. Instructions. A.3.instructions.6 New Funds. For purposes of this Item, a "New Fund" is a Fund that does not include in Form N-1A financial statements reporting operating results or that includes financial statements for the Fund's initial fiscal year reporting operating results for a period of 6 months or less. The following Instructions apply to New Funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph d -Subsection instructions falsefalse131false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for Class A sales charge discounts if you and your family (includes spouse and children under age 21) invest, or agree to invest in the future, at least $25,000, in the aggregate, in Classes A and C of the Van Eck Funds. More information about these and other discounts is available from your financial professional and in the &#8220;Shareholder Information&#8221; section of the Fund&#8217;s prospectus and in the &#8220;Availability of Discounts&#8221; and &#8220;Breakpoint Linkage Rules for Discounts&#8221; sections of the Fund&#8217;s Statement of Additional Information (&#8220;SAI&#8221;).</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse132false0rr_ShareholderFeesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Shareholder Fees (fees paid directly from your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subsection table falsefalse133false0rr_ShareholderFeesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact cik0000768847_S000029608Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact cik0000768847_S000029608Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsehttp://xbrl.sec.gov/rr/role/ShareholderFeesDatafalsefalse020010 - Schedule - Shareholder Feestruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000029608MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseVan Eck CM Commodity Index Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000029608Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000090895Memberrr_ProspectusShareClassAxisexplicitMemberVan Eck CM Commodity Index FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000029608MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseVan Eck CM Commodity Index Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000029608Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000090897Memberrr_ProspectusShareClassAxisexplicitMemberVan Eck CM Commodity Index FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000029608MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseVan Eck CM Commodity Index Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000029608Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000090898Memberrr_ProspectusShareClassAxisexplicitMemberVan Eck CM Commodity Index FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.05750.0575falsefalsefalsetruefalse6truetruetrue0.00000.0000falsefalsefalsetruefalse7truetruetrue0.00000.0000falsefalsefalsetruefalse8truetruetrue0.00000.0000falsefalsefalsetruefalse9truetruetrue0.05750.0575falsefalsefalsetruefalse10truetruetrue0.00000.0000falsefalsefalsetruefalse11truetruetrue0.00000.0000falsefalsefalsetruefalse12truetruetrue0.00000.0000falsefalsefalsetruefalse13truetruetrue0.05750.0575falsefalsefalsetruefalse14truetruetrue0.00000.0000falsefalsefalsetruefalse15truetruetrue0.00000.0000falsefalsefalsetruefalse16truetruetrue0.05750.0575falsefalsefalsetruefalse17truetruetrue0.00000.0000falsefalsefalsetruefalse18truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalse0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*4false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.00000.0000falsefalsefalsetruefalse6truetruetrue0.01000.0100falsefalsefalsetruefalse7truetruetrue0.00000.0000falsefalsefalsetruefalse8truetruetrue0.00000.0000falsefalsefalsetruefalse9truetruetrue0.00000.0000falsefalsefalsetruefalse10truetruetrue0.01000.0100falsefalsefalsetruefalse11truetruetrue0.00000.0000falsefalsefalsetruefalse12truetruetrue0.00000.0000falsefalsefalsetruefalse13truetruetrue0.00000.0000falsefalsefalsetruefalse14truetruetrue0.00000.0000falsefalsefalsetruefalse15truetruetrue0.00000.0000falsefalsefalsetruefalse16truetruetrue0.00000.0000falsefalsefalsetruefalse17truetruetrue0.00000.0000falsefalsefalsetruefalse18truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalse0rr_MaximumDeferredSalesChargeOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse32Shareholder Fees Van Eck CM Commodity Index FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000029608MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ShareholderFeesData.No authoritative reference available.falsefalse134false0rr_OperatingExpensesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 7 -Subsection table falsefalse135false0rr_AnnualFundOperatingExpensesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact cik0000768847_S000029608Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact cik0000768847_S000029608Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsehttp://xbrl.sec.gov/rr/role/OperatingExpensesDatafalsefalse020020 - Schedule - Annual Fund Operating Expensestruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000029608MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseVan Eck CM Commodity Index Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000029608Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000090895Memberrr_ProspectusShareClassAxisexplicitMemberVan Eck CM Commodity Index FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000029608MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseVan Eck CM Commodity Index Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000029608Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000090897Memberrr_ProspectusShareClassAxisexplicitMemberVan Eck CM Commodity Index FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000029608MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseVan Eck CM Commodity Index Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000029608Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000090898Memberrr_ProspectusShareClassAxisexplicitMemberVan Eck CM Commodity Index FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00750.0075falsefalsefalsetruefalse2truetruetrue0.00750.0075falsefalsefalsetruefalse3truetruetrue0.00750.0075falsefalsefalsetruefalse4truetruetrue0.00750.0075falsefalsefalsetruefalse5truetruetrue0.00980.0098falsefalsefalsetruefalse6truetruetrue0.00980.0098falsefalsefalsetruefalse7truetruetrue0.00980.0098falsefalsefalsetruefalse8truetruetrue0.00980.0098falsefalsefalsetruefalse9truetruetrue0.00630.0063falsefalsefalsetruefalse10truetruetrue0.00630.0063falsefalsefalsetruefalse11truetruetrue0.00630.0063falsefalsefalsetruefalse12truetruetrue0.00630.0063falsefalsefalsetruefalse13truetruetrue0.01320.0132falsefalsefalsetruefalse14truetruetrue0.01320.0132falsefalsefalsetruefalse15truetruetrue0.01320.0132falsefalsefalsetruefalse16truetruetrue0.00750.0075falsefalsefalsetruefalse17truetruetrue0.00750.0075falsefalsefalsetruefalse18truetruetrue0.00750.0075falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalse0rr_ManagementFeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00750.0075falsefalsefalsetruefalse2truetruetrue0.00750.0075falsefalsefalsetruefalse3truetruetrue0.00750.0075falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*4false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.00250.0025falsefalsefalsetruefalse6truetruetrue0.01000.0100falsefalsefalsetruefalse7truetruetrue0.00000.0000falsefalsefalsetruefalse8truetruetrue0.00000.0000falsefalsefalsetruefalse9truetruetrue0.00250.0025falsefalsefalsetruefalse10truetruetrue0.01000.0100falsefalsefalsetruefalse11truetruetrue0.00000.0000falsefalsefalsetruefalse12truetruetrue0.00000.0000falsefalsefalsetruefalse13truetruetrue0.00250.0025falsefalsefalsetruefalse14truetruetrue0.00000.0000falsefalsefalsetruefalse15truetruetrue0.00000.0000falsefalsefalsetruefalse16truetruetrue0.00250.0025falsefalsefalsetruefalse17truetruetrue0.00000.0000falsefalsefalsetruefalse18truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalse0rr_DistributionAndService12b1FeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse3falseRowprimaryElement*7false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00740.0074falsefalsefalsetruefalse2truetruetrue0.00860.0086falsefalsefalsetruefalse3truetruetrue0.01480.0148falsefalsefalsetruefalse4truetruetrue0.00980.0098falsefalsefalsetruefalse5truetruetrue0.00190.0019falsefalsefalsetruefalse6truetruetrue0.00170.0017falsefalsefalsetruefalse7truetruetrue0.00060.0006falsefalsefalsetruefalse8truetruetrue0.00110.0011falsefalsefalsetruefalse9truetruetrue0.00360.0036falsefalsefalsetruefalse10truetruetrue0.00310.0031falsefalsefalsetruefalse11truetruetrue0.00370.0037falsefalsefalsetruefalse12truetruetrue0.00470.0047falsefalsefalsetruefalse13falsetruetrue00falsefalsefalsetruefalse14falsetruetrue00falsefalsefalsetruefalse15falsetruetrue00falsefalsefalsetruefalse16truetruetrue0.00520.0052[1]falsefalsefalsetruefalse17truetruetrue0.00230.0023[1]falsefalsefalsetruefalse18truetruetrue0.00520.0052[1]falsefalsefalsetruefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalse0rr_OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1truetruetrue0.00520.0052falsefalsefalsetruefalse2truetruetrue0.00230.0023falsefalsefalsetruefalse3truetruetrue0.00520.0052falsefalsefalsetruefalseOthernanafalsefalse4falseRowprimaryElement*9false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01740.0174falsefalsefalsetruefalse2truetruetrue0.02610.0261falsefalsefalsetruefalse3truetruetrue0.02230.0223falsefalsefalsetruefalse4truetruetrue0.01730.0173falsefalsefalsetruefalse5truetruetrue0.01430.0143falsefalsefalsetruefalse6truetruetrue0.02160.0216falsefalsefalsetruefalse7truetruetrue0.01050.0105falsefalsefalsetruefalse8truetruetrue0.01100.0110falsefalsefalsetruefalse9truetruetrue0.01250.0125falsefalsefalsetruefalse10truetruetrue0.01950.0195falsefalsefalsetruefalse11truetruetrue0.01010.0101falsefalsefalsetruefalse12truetruetrue0.01110.0111falsefalsefalsetruefalse13truetruetrue0.03370.0337falsefalsefalsetruefalse14truetruetrue0.03130.0313falsefalsefalsetruefalse15truetruetrue0.03060.0306falsefalsefalsetruefalse16truetruetrue0.01520.0152falsefalsefalsetruefalse17truetruetrue0.00980.0098falsefalsefalsetruefalse18truetruetrue0.01270.0127falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalse0rr_ExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01520.0152falsefalsefalsetruefalse2truetruetrue0.00980.0098falsefalsefalsetruefalse3truetruetrue0.01270.0127falsefalsefalsetruefalseOthernanafalsefalse5falseRowprimaryElement*10false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000[4]falsefalsefalsetruefalse2truetruetrue-0.0011-0.0011[4]falsefalsefalsetruefalse3truetruetrue-0.0098-0.0098[4]falsefalsefalsetruefalse4truetruetrue-0.0003-0.0003[4]falsefalsefalsetruefalse5truetruetrue-0.0004-0.0004[3]falsefalsefalsetruefalse6truetruetrue0.00000.0000[3]falsefalsefalsetruefalse7truetruetrue-0.0004-0.0004[3]falsefalsefalsetruefalse8truetruetrue0.00000.0000[3]falsefalsefalsetruefalse9falsetruetrue00falsefalsefalsetruefalse10falsetruetrue00falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.00000.0000[5]falsefalsefalsetruefalse14truetruetrue-0.0013-0.0013[5]falsefalsefalsetruefalse15truetruetrue0.00000.0000[5]falsefalsefalsetruefalse16truetruetrue-0.0057-0.0057[2]falsefalsefalsetruefalse17truetruetrue-0.0033-0.0033[2]falsefalsefalsetruefalse18truetruetrue-0.0057-0.0057[2]falsefalsefalsetruefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse0rr_FeeWaiverOrReimbursementOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[2]1truetruetrue-0.0057-0.0057falsefalsefalsetruefalse2truetruetrue-0.0033-0.0033falsefalsefalsetruefalse3truetruetrue-0.0057-0.0057falsefalsefalsetruefalseOthernanafalsefalse6falseRowprimaryElement*11false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01740.0174falsefalsefalsetruefalse2truetruetrue0.02500.0250falsefalsefalsetruefalse3truetruetrue0.01250.0125falsefalsefalsetruefalse4truetruetrue0.01700.0170falsefalsefalsetruefalse5truetruetrue0.01390.0139falsefalsefalsetruefalse6truetruetrue0.02160.0216falsefalsefalsetruefalse7truetruetrue0.01010.0101falsefalsefalsetruefalse8truetruetrue0.01100.0110falsefalsefalsetruefalse9falsetruetrue00falsefalsefalsetruefalse10falsetruetrue00falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.03370.0337falsefalsefalsetruefalse14truetruetrue0.03000.0300falsefalsefalsetruefalse15truetruetrue0.03060.0306falsefalsefalsetruefalse16truetruetrue0.00950.0095falsefalsefalsetruefalse17truetruetrue0.00650.0065falsefalsefalsetruefalse18truetruetrue0.00700.0070falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalse0rr_NetExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00950.0095falsefalsefalsetruefalse2truetruetrue0.00650.0065falsefalsefalsetruefalse3truetruetrue0.00700.0070falsefalsefalsetruefalseOthernanafalsefalse1Other expenses are based on estimated amounts for the current fiscal year.2Van Eck Associates Corporation (the "Adviser") has agreed to waive fees and/or pay Fund expenses to the extent necessary to prevent the operating expenses of the Fund (excluding acquired fund fees and expenses, interest expense, trading expenses, dividends on securities sold short, taxes and extraordinary expenses) from exceeding 0.95% for Class A, 0.65% for Class I, and 0.70% for Class Y of the Fund's average daily net assets per year until May 1, 2012. During such time, the expense limitation is expected to continue until the Board of Trustees acts to discontinue all or a portion of such expense limitation.36Annual Fund Operating Expenses Van Eck CM Commodity Index FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000768847_S000029608MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to OperatingExpensesData.No authoritative reference available.falsefalse136false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Expense ExamplefalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse137false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The following 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 either redeem all of your shares at the end of these periods or continue to hold them. The example also assumes that your investment has a 5% return each year and that the Fund&#8217;s operating expenses remain the same. Although your actual expenses may be higher or lower, based on these assumptions, your costs would be:</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThe Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection example falsefalse138false0rr_ExpenseExampleByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00SoldfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse139false0rr_ExpenseExampleWithRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact cik0000768847_S000029608Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact cik0000768847_S000029608Member column rr_ProspectusShareClassAxis compact * row primary compact * ~truehttp://xbrl.sec.gov/rr/role/ExpenseExamplefalsefalse020030 - Schedule - Expense Example {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue742742falsefalsefalsetruefalse2truefalsetrue353353falsefalsefalsetruefalse3truefalsetrue127127falsefalsefalsetruefalse4truefalsetrue173173falsefalsefalsetruefalse5truefalsetrue708708falsefalsefalsetruefalse6truefalsetrue319319falsefalsefalsetruefalse7truefalsetrue103103falsefalsefalsetruefalse8truefalsetrue112112falsefalsefalsetruefalse9truefalsetrue695695falsefalsefalsetruefalse10truefalsetrue298298falsefalsefalsetruefalse11truefalsetrue103103falsefalsefalsetruefalse12truefalsetrue113113falsefalsefalsetruefalse13truefalsetrue340340falsefalsefalsetruefalse14truefalsetrue303303falsefalsefalsetruefalse15truefalsetrue309309falsefalsefalsetruefalse16truefalsetrue666666falsefalsefalsetruefalse17truefalsetrue6666falsefalsefalsetruefalse18truefalsetrue7272falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalsefalseUSDfalsefalse$2falseColumnprimaryElement*4false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue10911091falsefalsefalsetruefalse2truefalsetrue801801falsefalsefalsetruefalse3truefalsetrue603603falsefalsefalsetruefalse4truefalsetrue542542falsefalsefalsetruefalse5truefalsetrue998998falsefalsefalsetruefalse6truefalsetrue676676falsefalsefalsetruefalse7truefalsetrue330330falsefalsefalsetruefalse8truefalsetrue350350falsefalsefalsetruefalse9truefalsetrue949949falsefalsefalsetruefalse10truefalsetrue612612falsefalsefalsetruefalse11truefalsetrue322322falsefalsefalsetruefalse12truefalsetrue353353falsefalsefalsetruefalse13truefalsetrue10361036falsefalsefalsetruefalse14truefalsetrue954954falsefalsefalsetruefalse15truefalsetrue945945falsefalsefalsetruefalse16truefalsetrue975975falsefalsefalsetruefalse17truefalsetrue279279falsefalsefalsetruefalse18truefalsetrue346346falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000029608MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseVan Eck CM Commodity Index Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000029608Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000090895Memberrr_ProspectusShareClassAxisexplicitMemberVan Eck CM Commodity Index FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue666666falsefalsefalsetruefalse2truefalsetrue975975falsefalsefalsetruefalseOthernanafalsefalse2falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000029608MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseVan Eck CM Commodity Index Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000029608Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000090897Memberrr_ProspectusShareClassAxisexplicitMemberVan Eck CM Commodity Index FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue6666falsefalsefalsetruefalse2truefalsetrue279279falsefalsefalsetruefalseOthernanafalsefalse3falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000029608MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseVan Eck CM Commodity Index Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000029608Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000090898Memberrr_ProspectusShareClassAxisexplicitMemberVan Eck CM Commodity Index FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue7272falsefalsefalsetruefalse2truefalsetrue346346falsefalsefalsetruefalseOthernanafalsefalse23Expense Example Van Eck CM Commodity Index Fund (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000029608MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExample.No authoritative reference available.falsefalse140false0rr_ExpenseExampleNoRedemptionByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00HeldfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse141false0rr_ExpenseExampleNoRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption column dei_LegalEntityAxis compact cik0000768847_S000029608Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption column dei_LegalEntityAxis compact cik0000768847_S000029608Member column rr_ProspectusShareClassAxis compact * row primary compact * ~truehttp://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemptionfalsefalse020040 - Schedule - Expense Example, No Redemption {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue742742falsefalsefalsetruefalse2truefalsetrue253253falsefalsefalsetruefalse3truefalsetrue127127falsefalsefalsetruefalse4truefalsetrue173173falsefalsefalsetruefalse5truefalsetrue708708falsefalsefalsetruefalse6truefalsetrue219219falsefalsefalsetruefalse7truefalsetrue103103falsefalsefalsetruefalse8truefalsetrue112112falsefalsefalsetruefalse9truefalsetrue695695falsefalsefalsetruefalse10truefalsetrue198198falsefalsefalsetruefalse11truefalsetrue103103falsefalsefalsetruefalse12truefalsetrue113113falsefalsefalsetruefalse13truefalsetrue340340falsefalsefalsetruefalse14truefalsetrue303303falsefalsefalsetruefalse15truefalsetrue309309falsefalsefalsetruefalse16truefalsetrue666666falsefalsefalsetruefalse17truefalsetrue6666falsefalsefalsetruefalse18truefalsetrue7272falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalsefalseUSDfalsefalse$2falseColumnprimaryElement*4false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue10911091falsefalsefalsetruefalse2truefalsetrue801801falsefalsefalsetruefalse3truefalsetrue603603falsefalsefalsetruefalse4truefalsetrue542542falsefalsefalsetruefalse5truefalsetrue998998falsefalsefalsetruefalse6truefalsetrue676676falsefalsefalsetruefalse7truefalsetrue330330falsefalsefalsetruefalse8truefalsetrue350350falsefalsefalsetruefalse9truefalsetrue949949falsefalsefalsetruefalse10truefalsetrue612612falsefalsefalsetruefalse11truefalsetrue322322falsefalsefalsetruefalse12truefalsetrue353353falsefalsefalsetruefalse13truefalsetrue10361036falsefalsefalsetruefalse14truefalsetrue954954falsefalsefalsetruefalse15truefalsetrue945945falsefalsefalsetruefalse16truefalsetrue975975falsefalsefalsetruefalse17truefalsetrue279279falsefalsefalsetruefalse18truefalsetrue346346falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalsefalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000029608MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseVan Eck CM Commodity Index Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000029608Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000090895Memberrr_ProspectusShareClassAxisexplicitMemberVan Eck CM Commodity Index FundClass AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue666666falsefalsefalsetruefalse2truefalsetrue975975falsefalsefalsetruefalseOthernanafalsefalse2falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000029608MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseVan Eck CM Commodity Index Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000029608Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000090897Memberrr_ProspectusShareClassAxisexplicitMemberVan Eck CM Commodity Index FundClass IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue6666falsefalsefalsetruefalse2truefalsetrue279279falsefalsefalsetruefalseOthernanafalsefalse3falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000029608MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-14T00:00:002011-04-14T00:00:00falsefalseVan Eck CM Commodity Index Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_S000029608Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000768847_C000090898Memberrr_ProspectusShareClassAxisexplicitMemberVan Eck CM Commodity Index FundClass YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue7272falsefalsefalsetruefalse2truefalsetrue346346falsefalsefalsetruefalseOthernanafalsefalse23Expense Example, No Redemption Van Eck CM Commodity Index Fund (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000768847_S000029608MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExampleNoRedemption.No authoritative reference available.falsefalse142false0rr_PortfolioTurnoverHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PORTFOLIO TURNOVERfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 5 -Subsection instructions falsefalse143false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalse144false0rr_StrategyHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL INVESTMENT STRATEGIESfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse145false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund seeks to achieve its investment objective by investing in instruments that derive their value from the performance of the UBS Bloomberg Constant Maturity Commodity Total Return Index (the &#8220;CMCI&#8221;), as described below, and in bonds, debt securities and other fixed income instruments (&#8220;Fixed Income Instruments&#8221;) issued by various U.S. public- or private-sector entities. The Fund invests in commodity-linked derivative instruments, including commodity index-linked notes, swap agreements, commodity futures contracts and options on futures contracts that provide economic exposure to the investment returns of the commodities markets, as represented by the CMCI and its constituents. Commodities are assets that have tangible properties, such as oil, metals, and agricultural products. A commodity-linked derivative is a derivative instrument whose value is linked to the movement of a commodity, commodity index, commodity option or futures contract. The value of commodity-linked derivative instruments may be affected by overall market movements and other factors affecting the value of a particular industry or commodity, such as weather, disease, embargoes, or political and regulatory developments.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The CMCI is a rules-based, composite benchmark index diversified across 23 commodities from the following five sectors: energy, precious metals, industrial metals, agriculture and livestock. The CMCI is comprised of futures contracts with maturities ranging from around three months to over three years for each commodity, depending on liquidity. The overall return of the CMCI reflects a combination of (i)&#160;the returns on the futures contracts comprising the CMCI; and (ii)&#160;the daily fixed-income return that would be earned on a hypothetical portfolio of 91-day U.S. Treasury bills theoretically deposited as margin for the hypothetical positions in the futures contracts comprising the CMCI. The selection and relative weightings of the components of the CMCI are designed to reflect the economic significance and market liquidity of each commodity, as determined based on global economic data, consumption data, commodity futures prices, open interest and volume data. The maturity of each commodity component in the CMCI remains fixed at a predefined time interval at all times by means of a continuous rolling process, in which a weighted percentage of shorter dated contracts for each commodity are swapped for longer dated contracts on a daily basis. The CMCI is rebalanced monthly back to the target weightings of the commodity components of the CMCI and the target weightings of all commodity components are revised twice per year. A more detailed description of the CMCI is contained in Appendix A to the prospectus.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund will seek to track the returns of the CMCI by entering into swap contracts and commodity index-linked notes with one or more counterparties, which contracts and notes will rise and fall in value in response to changes in the value of the CMCI. As of the date of this prospectus, UBS was the only available counterparty with which the Fund may enter into such swap contracts on the CMCI. The Fund may enter into such contracts and notes directly or indirectly through a wholly-owned subsidiary of the Fund (the &#8220;Subsidiary&#8221;). Commodity index-linked notes are derivative debt instruments with principal and/or coupon payments linked to the performance of commodity indices (such as the CMCI). These commodity index-linked notes are sometimes referred to as &#8220;structured notes&#8221; because the terms of these notes may be structured by the issuer and the purchaser of the note. The Fund may also seek to gain exposure to the individual commodity components of the CMCI by investing in futures contracts that comprise the CMCI, either directly or indirectly through the Subsidiary.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">For tax reasons, it may be advantageous for the Fund to create and maintain its exposure to the commodity markets, in whole or in part, by investing in the Subsidiary. The Subsidiary has the same investment objective as the Fund and the portfolio of the Subsidiary is managed by the Adviser for the exclusive benefit of the Fund. As discussed in greater detail elsewhere in this prospectus, the Subsidiary (unlike the Fund) may invest without limitation in commodity-linked swap agreements and other commodity-linked derivative instruments including futures. The Fund may invest up to 25% of its assets in the Subsidiary.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The derivative instruments in which the Fund and the Subsidiary primarily intend to invest are instruments linked to commodity indices, such as the CMCI, and instruments linked to the value of a particular commodity or commodity futures contract, or a subset of commodities or commodity futures contracts. These instruments may specify exposure to commodity futures with different roll dates, reset dates or contract months than those specified by a particular commodity index. As a result, the commodity-linked derivatives component of the Fund&#8217;s portfolio may deviate from the returns of any particular commodity index. The Fund or the Subsidiary may over- weight or under-weight its exposure to a particular commodity index, or a subset of commodities, such that the Fund has greater or lesser exposure to that index than the value of the Fund&#8217;s net assets, or greater or lesser exposure to a subset of commodities than is represented by a particular commodity index. Such deviations may be the result of temporary market fluctuations, and under normal circumstances, the Fund will seek to maintain notional exposure to one or more commodity indices within 5% (plus or</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;">minus) of the value of the Fund&#8217;s net assets. To the extent the CMCI is concentrated in a particular industry (or one or more commodities that comprise an industry) the Fund will necessarily be concentrated in that industry.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">Assets not invested in commodity-linked derivative instruments or the Subsidiary may be invested in Fixed Income Instruments, including derivative Fixed Income Instruments. The Fund is non-diversified, which means that it may invest its assets in a smaller number of issuers than a diversified fund.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The average duration of the portfolio of Fixed Income Instruments will vary based on interest rates and, under normal market conditions, is not expected to exceed five years. Duration is a measure of the expected life of a fixed income security that is used to determine the sensitivity of a security&#8217;s price to changes in interest rates. The longer a security&#8217;s duration, the more sensitive it will be to changes in interest rates. Similarly, a fund with a longer average portfolio duration will be more sensitive to changes in interest rates than a fund with a shorter average portfolio duration. By way of example, the price of a bond fund with an average duration of five years would be expected to fall approximately 5% if interest rates rose by one percentage point. The Fund will invest primarily in securities of the U.S. Government and its agencies and investment grade bonds of private issuers rated Baa or higher or, if unrated, determined by the Adviser to be of comparable quality. The Fund may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques (such as buy back or dollar rolls, repurchase agreements or reverse repurchase agreements). The Fund may also invest, without limitation, in money market funds.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Adviser may hire and terminate sub-advisers in accordance with the terms of an exemptive order obtained by the Fund and the Adviser from the SEC, under which the Adviser is permitted, subject to supervision and approval of the Board of Trustees, to enter into and materially amend sub-advisory agreements without seeking shareholder approval. The Adviser will furnish shareholders of the Fund with information regarding a new sub-adviser within 90 days of the hiring of the new sub-adviser. Currently, the Adviser has not hired a sub-adviser to assist with the portfolio management of the Fund.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse146false0rr_RiskHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL RISKSfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subsection b falsefalse147false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">There is no assurance that the Fund will achieve its investment objective. The Fund&#8217;s share price and return will fluctuate with changes in the market value of the Fund&#8217;s portfolio securities. Accordingly, an investment in the Fund involves the risk of losing money.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Commodities and Commodity-Linked Derivatives.</b> Exposure to the commodities markets, such as precious metals, industrial metals, gas and other energy products and natural resources, may subject the Fund to greater volatility than investments in traditional securities. The commodities markets may fluctuate widely based on a variety of factors including changes in overall market movements, political and economic events and policies, war, acts of terrorism, natural disasters and changes in interest rates or inflation rates. Because the value of a commodity-linked derivative instrument and structured note typically are based upon the price movements of physical commodities, the value of these securities will rise or fall in response to changes in the underlying commodities or related index of investment.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Counterparty.</b> A loss may be sustained as a result of the failure of another party to a contract (usually referred to as a &#8220;counterparty&#8221;) to make required payments or otherwise comply with a contract&#8217;s terms. The Fund also bears the risk of loss of the amount expected to be received under a swap agreement in the event of the default or bankruptcy of a swap agreement counterparty. In addition, the Fund may enter into swap agreements with a limited number of counterparties, and as of the date of this prospectus, UBS was the only available counterparty with which the Fund may enter into such swap contracts on the CMCI. The Fund may invest in commodity- linked structured notes issued by a limited number of issuers that will act as counterparties. The Fund&#8217;s use of one or a limited number of counterparties and its investments in commodity-linked structured notes issued by only a limited number of issuers increases the Fund&#8217;s exposure to counterparty credit risk. Swap agreements also may be considered to be illiquid. Further, there is a risk that no suitable counterparties are willing to enter into, or continue to enter into, transactions with the Fund and, as a result, the Fund may not be able to achieve its investment objective.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Debt Securities.</b> Debt securities are subject to credit risk and interest rate risk. Credit risk refers to the possibility that the issuer of a debt security will be unable to make interest payments or repay principal when it becomes due. Interest rate risk refers to fluctuations in the value of a debt security resulting from changes in the general level of interest rates.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Derivatives.</b> The use of swap agreements, options, futures contracts and structured notes, presents risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. The use of derivatives can lead to losses because of adverse movements in the price or value of the underlying security, commodity, asset, index or reference rate. Derivative strategies often involve leverage, which may exaggerate a loss, potentially causing the Fund to lose more money than it would have lost had it invested in the underlying security. Also, a liquid secondary market may not always exist for the Fund&#8217;s derivative positions at times when the Fund might wish to terminate or sell such positions and over the counter instruments may be illiquid.</font></p> <p><font style="font-family:sans-serif; font-size:3.5mm;"><b>Industry Concentration.</b> The Fund may be subject to greater risks and market fluctuations than a fund whose portfolio has exposure to a broader range of industries. The Fund may be susceptible to financial, economic, political or market events, as well as government regulation, impacting a particular industry.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Market.</b> Market risk refers to the risk that the market prices of securities, commodities and related instruments that the Fund holds will rise or fall, sometimes rapidly or unpredictably. In general, equity securities and commodities tend to have greater price volatility than debt securities.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Non-Diversification.</b> A non-diversified fund&#8217;s greater investment in a single issuer makes the fund more susceptible to financial, economic or market events impacting such issuer. A decline in the value of or default by a single security in the non-diversified fund&#8217;s portfolio may have a greater negative effect than a similar decline or default by a single security in a diversified portfolio.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Regulatory.</b> Changes in the laws or regulations of the United States or the Cayman Islands could affect the operations of the Fund or the Subsidiary and impair the ability of the Fund to achieve its investment objective. For example, the U.S. Commodity Futures Trading Commission (&#8220;CFTC&#8221;) recently proposed amendments to existing regulations that, if adopted as proposed, would subject the Fund&#8217;s activities involving investments in futures contracts and similar instruments to regulation by the CFTC.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Repurchase and Reverse Repurchase Agreements.</b> A repurchase agreement exposes the Fund to the risk that the party that sells the security may default on its obligation to repurchase it. The Fund may lose money if it cannot sell the security at the agreed-upon time and price or the security loses value before it can be sold. A reverse repurchase agreement involves the risk that the market value of the securities the Fund is obligated to repurchase under the agreement may decline below the repurchase price.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Subsidiary.</b> By investing in the Subsidiary, the Fund is indirectly exposed to the risks associated with the Subsidiary&#8217;s investments. There is no guarantee that the investment objective of the Subsidiary will be achieved.</font></p> <p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;"><b>Tracking Error.</b> The Fund&#8217;s return may not match the return of the CMCI due to, among other factors, the Fund incurring operating expenses, and not being fully invested at all times as a result of cash inflows and cash reserves to meet redemptions.</font></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringNarrative Risk Disclosure. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Clause instruction -Subsection b falsefalse148false0rr_BarChartAndPerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PERFORMANCEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse149false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="margin:2.1mm 0 0;"><font style="font-family:sans-serif; font-size:3.5mm;">The Fund commenced operations on December 31, 2010. 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