Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Feb. 01, 2012
Small Cap Value (Second Prospectus Summary) | Small Cap Value
Risk Return [Abstract]	rr_RiskReturnAbstract
Risk/Return, Heading	rr_RiskReturnHeading	Small Cap Value Institutional Fund
Investment Objective, Heading	rr_ObjectiveHeading	Investment Objective -
investment Objective, Primary	rr_ObjectivePrimaryTextBlock	The Small Cap Value Institutional Fund seeks long-term capital appreciation.
Expense, Heading	rr_ExpenseHeading	Fees and Expenses of the Fund -
Expense, Narrative	rr_ExpenseNarrativeTextBlock	This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.
Shareholder Fees, Caption	rr_ShareholderFeesCaption	Shareholder Fees (fees paid directly from your investment)
Operating Expenses, Caption	rr_OperatingExpensesCaption	Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover, Heading	rr_PortfolioTurnoverHeading	Portfolio Turnover.
Portfolio Turnover	rr_PortfolioTurnoverTextBlock	The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 70% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	70.00%
Expenses, Restated to Reflect Current	rr_ExpensesRestatedToReflectCurrent	Expense information in the table has been restated to reflect current fees.
Expense Example, Heading	rr_ExpenseExampleHeading	Example.
Expense Example, Narrative	rr_ExpenseExampleNarrativeTextBlock	This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Although the actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example, Footnotes	rr_ExpenseExampleFootnotesTextBlock	The above Examples reflect applicable contractual fee waiver/expense reimbursement arrangements for the duration of the arrangements only.
Investment Strategy, Heading	rr_StrategyHeading	Principal Investment Strategies -
Investment Strategy, Narrative	rr_StrategyNarrativeTextBlock	The Fund pursues its objective by investing, under normal market conditions, at least 80% of its net assets (plus borrowings for investment purposes) in a diversified portfolio of equity securities, which include common stocks, rights, options, warrants, convertible debt securities, and American Depositary Receipts ("ADRs") that, when purchased, have market capitalizations that are usually within the range of companies in the Russell 2000 Value Index. Although a universal definition of small-capitalization companies does not exist, the Fund generally defines small-capitalization companies as those whose market capitalization is similar to the market capitalization of companies in the Russell 2000 Value Index, which is an unmanaged index measuring the performance of the small cap value segment of the U.S. equity universe and which includes companies with lower price-to-book ratios and lower forecasted growth values. Security Investors, LLC , also known as Guggenheim Investments (the "Investment Manager"), typically chooses equity securities that appear undervalued relative to assets, earnings, growth potential or cash flows and may invest in a limited number of industries or industry sectors, including the technology sector. The Fund may sell a security if it is no longer considered undervalued or when the company begins to show deteriorating fundamentals. The Fund also may invest a portion of its assets in derivatives, including options and futures contracts. These instruments may be used to hedge the Fund's portfolio, to maintain exposure to the equity markets or to increase returns. The Fund may, from time to time, invest a portion of its assets in technology stocks. The Fund may invest in a variety of investment vehicles, including those that seek to track the composition and performance of a specific index, such as exchange traded funds ("ETFs") and other mutual funds. The Fund may use these index-based investments as a way of managing its cash position to gain exposure to the equity markets or a particular sector of the equity market, while maintaining liquidity. Certain investment vehicles' securities and other securities in which the Fund may invest are restricted securities, which may be illiquid. The Fund actively trades its investments without regard to the length of time they have been owned by the Fund, which results in higher portfolio turnover. Under adverse or unstable market conditions, the Fund could invest some or all of its assets in cash, fixed-income securities, government bonds, money market securities, or repurchase agreements. Although the Fund would do this only in seeking to avoid losses, the Fund may be unable to pursue its investment objective during that time, and it could reduce the benefit from any upswing in the market.
Risk, Heading	rr_RiskHeading	Principal Risks -
Risk, Narrative	rr_RiskNarrativeTextBlock	An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The value of an investment in the Fund will fluctuate and is subject to investment risks, which means investors could lose money. The principal risks of investing in the Fund are listed below. Active Trading Risk. Active trading, also called "high turnover," may have a negative impact on performance. Active trading may result in higher brokerage costs or mark-up charges, which are ultimately passed on to shareholders of the Fund. It may also result in short-term capital gains, which have a negative tax effect, and could also result in greater taxable distributions to shareholders of the Fund. Equity Derivatives Risk. Equity derivatives may pose risks in addition to those associated with investing directly in securities or other investments, including illiquidity of the equity derivative, imperfect correlations with underlying investments or the Fund's other portfolio holdings, lack of availability and counterparty risk. Equity Securities Risk. Equity securities include common stocks and other equity securities (and securities convertible into stocks), and the prices of equity securities fluctuate in value more than other investments. They reflect changes in the issuing company's financial condition and changes in the overall market. Common stocks generally represent the riskiest investment in a company. The Fund may lose a substantial part, or even all, of its investment in a company's stock. Growth stocks may be more volatile than value stocks. Foreign Securities Risk. Foreign securities, including investments in foreign securities through ADRs, carry additional risks when compared to U.S. securities, including currency fluctuations, adverse political and economic developments, unreliable or untimely information, less liquidity, limited legal recourse and higher transactional costs. Index Risk. Investments intended to track a benchmark index may not have performance that corresponds with the performance of the benchmark index for any period of time and may underperform the overall stock market. Investment in Investment Vehicles Risk. Investing in other investment vehicles, including ETFs and other mutual funds, subjects the Fund to those risks affecting the investment vehicle, including the possibility that the value of the underlying securities held by the investment vehicle could decrease. Moreover, the Fund and its shareholders will incur its pro rata share of the underlying vehicles' expenses.                                                                                   Leverage Risk. The Fund's use of leverage through derivatives may cause the Fund to be more volatile than if it had not been leveraged. Leverage can arise through the use of derivatives. Liquidity Risk. Investments are subject to liquidity risk when they are difficult to purchase or sell. Management Risk. The Fund is actively managed. There is no guarantee that the investment strategies will be successful. Market Risk. The market value of the securities held by the Fund may fluctuate resulting from factors affecting the individual company or other factors such as changing economic, political or financial market conditions. Overweighting Risk. Overweighting investments in certain sectors or industries of the stock market increases the risk that the Fund will suffer a loss because of general declines in the prices of stocks in those sectors or industries. Restricted Securities Risk. Restricted securities generally cannot be sold to the public and may involve a high degree of business and financial risk which may result in substantial losses to the Fund. Smaller Companies Risk. The securities of smaller companies are subject to greater volatility, especially during periods of economic uncertainty. These risks are likely to be greater for micro-cap companies. Technology Stocks Risk. Stocks of companies involved in the technology sector may be very volatile. Value Stocks Risk. Value stocks are subject to the risk that the intrinsic value of the stock may never be realized by the market or that the price goes down.
Risk, Lose Money	rr_RiskLoseMoney	The value of an investment in the Fund will fluctuate and is subject to investment risks, which means investors could lose money.
Risk, Not Insured Depository Institution	rr_RiskNotInsuredDepositoryInstitution	An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table, Heading	rr_BarChartAndPerformanceTableHeading	Performance Information -
Performance, Narrative	rr_PerformanceNarrativeTextBlock	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 returns for one year and since inception have compared to those of a broad measure of market performance. As with all mutual funds, past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available on the Fund's website at www.rydex-sgi.com or by calling 1-800-820-0888.
Performance, Information Illustrates Variability of Returns	rr_PerformanceInformationIllustratesVariabilityOfReturns	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 returns for one year and since inception have compared to those of a broad measure of market performance.
Performance, Availability Phone Number	rr_PerformanceAvailabilityPhone	1-800-820-0888
Performance, Availability Website Address	rr_PerformanceAvailabilityWebSiteAddress	www.rydex-sgi.com
Performance, Past Does Not Indicate Future	rr_PerformancePastDoesNotIndicateFuture	As with all mutual funds, past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Bar Chart, Closing	rr_BarChartClosingTextBlock	Highest Quarter Return    2Q 2009    31.34%                              Lowest Quarter Return      3Q 2011    -20.91%
Index No Deduction for Fees, Expenses, Taxes	rr_IndexNoDeductionForFeesExpensesTaxes	reflects no deductions for fees, expenses, or taxes
Performance Table, Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	After-tax returns shown in the table are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of any state or local taxes.
Performance Table, Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts ("IRAs").
Performance Table, Narrative	rr_PerformanceTableNarrativeTextBlock	After-tax returns shown in the table are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of any state or local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts ("IRAs").
Average Annual Returns, Caption	rr_AverageAnnualReturnCaption	Average Annual Total Returns (For the periods ended December 31, 2011)
Small Cap Value (Second Prospectus Summary) | Small Cap Value | Russell 2000 Value Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Russell 2000 Value Index (reflects no deductions for fees, expenses, or taxes)
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	(5.50%)
Average Annual Returns, Since Inception	rr_AverageAnnualReturnSinceInception	3.89%
Average Annual Returns, Inception Date	rr_AverageAnnualReturnInceptionDate	Jul. 14, 2008
Small Cap Value (Second Prospectus Summary) | Small Cap Value | Institutional
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Management fees	rr_ManagementFeesOverAssets	1.00%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	0.81%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.81%	[1]
Fee waiver (and/or expense reimbursement)	rr_FeeWaiverOrReimbursementOverAssets	(0.76%)	[2]
Total annual fund operating expenses after fee waiver (and/or expense reimbursement)	rr_NetExpensesOverAssets	1.05%
Expense Example, With Redemption, 1 Year	rr_ExpenseExampleYear01	107
Expense Example, With Redemption, 3 Years	rr_ExpenseExampleYear03	495
Expense Example, With Redemption, 5 Years	rr_ExpenseExampleYear05	909
Expense Example, With Redemption, 10 Years	rr_ExpenseExampleYear10	2,064
Annual Return 2009	rr_AnnualReturn2009	61.40%
Annual Return 2010	rr_AnnualReturn2010	21.90%
Annual Return 2011	rr_AnnualReturn2011	(5.30%)
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Highest Quarter Return
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	31.34%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Lowest Quarter Return
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2011
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(20.91%)
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Institutional Fund Return before taxes
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	(5.34%)
Average Annual Returns, Since Inception	rr_AverageAnnualReturnSinceInception	16.74%
Average Annual Returns, Inception Date	rr_AverageAnnualReturnInceptionDate	Jul. 14, 2008
Small Cap Value (Second Prospectus Summary) | Small Cap Value | Institutional | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Institutional Fund Return after taxes on distributions
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	(6.00%)
Average Annual Returns, Since Inception	rr_AverageAnnualReturnSinceInception	14.39%
Average Annual Returns, Inception Date	rr_AverageAnnualReturnInceptionDate	Jul. 14, 2008
Small Cap Value (Second Prospectus Summary) | Small Cap Value | Institutional | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Institutional Fund Return after taxes on distributions and sale of fund shares
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	(3.35%)
Average Annual Returns, Since Inception	rr_AverageAnnualReturnSinceInception	13.33%
Average Annual Returns, Inception Date	rr_AverageAnnualReturnInceptionDate	Jul. 14, 2008

[1] Expense information in the table has been restated to reflect current fees.

[2] The Investment Manager has contractually agreed through January 31, 2013 to waive fees and/or reimburse Fund expenses to the extent necessary to limit the ordinary operating expenses (including distribution (12b-1) fees, but exclusive of brokerage costs, dividends on securities sold short, acquired fund fees and expenses, interest, taxes, litigation, indemnification, and extraordinary expenses) of the Fund to an annual percentage of 1.05% of the average daily net assets for the Fund. The Fund may have "Total annual fund operating expenses after fee waiver" greater than the expense cap as a result of any acquired fund fees and expenses or other expenses that are excluded from the calculation. The Investment Manager is entitled to reimbursement by the Fund of fees waived or expenses reimbursed during any of the previous 36 months beginning on the date of the expense limitation agreement. The agreement will expire when it reaches its termination or when the Investment Manager ceases to serve as such (subject to recoupment rights).