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Label Element Value
[RiskReturnAbstract] rr_RiskReturnAbstract  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Sep. 30, 2012
Registrant Name dei_EntityRegistrantName SECURITY MID CAP GROWTH FUND
Central Index Key dei_EntityCentralIndexKey 0000088676
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Apr. 30, 2013
Document Effective Date dei_DocumentEffectiveDate Apr. 30, 2013
Prospectus Date rr_ProspectusDate Apr. 30, 2013
Guggenheim StylePlus - Mid Growth Fund | Guggenheim StylePlus & Mid Growth Institutional Fund Class A,B And C
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading

Guggenheim StylePlus – Mid Growth Fund (formerly, Mid Cap Growth Fund)
Objective [Heading] rr_ObjectiveHeading

INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

Guggenheim StylePlus – Mid Growth Fund seeks long-term growth of capital.
Expense [Heading] rr_ExpenseHeading

FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in the Family of Funds, as defined on page 47 of the Fund’s prospectus. More information about these and other discounts is available from your financial professional and in the “Sales Charges–Class A Shares” section on page 25 of the Fund’s prospectus and the “How to Purchase Shares” section on page 49 of the Fund’s statement of additional information.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption

SHAREHOLDER FEES (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption

ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading

PORTFOLIO TURNOVER
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

The 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 149% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 149.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in the Family of Funds, as defined on page 47 of the Fund’s prospectus.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount 100,000
Acquired Fund Fees and Expenses, Based on Estimates [Text] rr_AcquiredFundFeesAndExpensesBasedOnEstimates

Acquired Fund Fees and Expenses are based on estimated amounts for the current fiscal year.
Expense Example [Heading] rr_ExpenseExampleHeading

EXAMPLE
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the 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 by, Year, Caption [Text] rr_ExpenseExampleByYearCaption

Redeemed
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption

Not Redeemed
Strategy [Heading] rr_StrategyHeading

PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund seeks to exceed the total return of the Russell Midcap Growth Index (the “Index”). The Fund pursues its objective by investing, under normal market conditions, in: (i) equity securities issued by companies that have market capitalizations within the range of companies in the Index; (ii) equity derivatives that, when purchased, provide exposure to equity securities of companies with market capitalizations usually within the range of companies in the Index; (iii) equity derivatives based on mid-capitalization indices, growth indices and/or other indices and other derivatives deemed appropriate by Security Investors, LLC, also known as Guggenheim Investments (the “Investment Manager”); (iv) fixed income securities; and (v) cash investments to collateralize derivatives positions. As of March 31, 2013, the Index consisted of securities of companies with market capitalizations that ranged from $321.4 million to $44.0 billion.

Equity securities in which the Fund may invest include common stocks, rights and warrants, and American Depository Receipts (“ADRs”). Derivatives in which the Fund may invest include options, futures contracts, swap agreements, and forward contracts. Fixed income securities and other securities in which the Fund may invest include debt securities selected from a variety of sectors and credit qualities (principally, investment grade), principally, corporate bonds, participations in and assignments of syndicated bank loans, asset-backed securities (including mortgage-backed securities and structured finance investments), U.S. government and agency securities (including those not backed by the full faith and credit of the U.S. government), mezzanine and preferred securities, commercial paper, zero-coupon bonds, non-registered or restricted securities (consisting of securities originally issued in reliance on Rule 144A and Regulation S), step-up securities (such as step-up bonds) and convertible securities that Guggenheim Investments believes offer attractive yield and/or capital appreciation potential. The Fund may invest in securities listed, traded or dealt in other countries. The Fund may hold securities of any duration or maturity. Fixed income securities in which the Fund may invest may pay fixed or variable rates of interest. The Fund may invest in a variety of investment vehicles, principally closed-end funds, exchange traded funds (“ETFs”) and other mutual funds.

Allocation decisions within the asset categories are at the discretion of the Investment Manager and are based on the Investment Manager’s judgment of the current investment environment (including market volatility), the attractiveness of each asset category, the correlations among Index components, individual positions or each asset category, and expected returns. In selecting investments for the Fund, the Investment Manager uses quantitative analysis, credit research and due diligence on issuers, regions and sectors to select the Fund’s investments and other proprietary strategies to identify securities and other assets that, in combination, are expected to contribute to exceeding the total return of the Index. Derivative instruments may be used extensively by the Investment Manager to maintain exposure to the equity and fixed income markets, to hedge the Fund’s portfolio, or to increase returns. The Investment Manager may determine to sell a security for several reasons including the following: (1) to meet redemption requests; (2) to close-out or unwind derivatives transactions; (3) to realize gains; or (4) if market conditions change.

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.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration

Under normal market conditions, in: (i) equity securities issued by companies that have market capitalizations within the range of companies in the Index; (ii) equity derivatives that, when purchased, provide exposure to equity securities of companies with market capitalizations usually within the range of companies in the Index; (iii) equity derivatives based on mid-capitalization indices, growth indices and/or other indices and other derivatives deemed appropriate by Security Investors, LLC, also known as Guggenheim Investments (the “Investment Manager”); (iv) fixed income securities; and (v) cash investments to collateralize derivatives positions.
Risk [Heading] rr_RiskHeading

PRINCIPAL RISKS
Risk Narrative [Text Block] 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. 

Asset-Backed and Mortgage-Backed Securities Risk – Investors in asset-backed securities, including mortgage-backed securities and structured finance investments, generally receive payments that are part interest and part return of principal. These payments may vary based on the rate at which the underlying borrowers pay off their loans. Some asset-backed securities, including mortgage-backed securities, may have structures that make their reaction to interest rates and other factors difficult to predict, making their prices very volatile and they are subject to liquidity risk.

Convertible Securities Risk – Convertible securities may be subordinate to other securities. The total return for a convertible security depends, in part, upon the performance of the underlying security into which it can be converted. The value of convertible securities tends to decline as interest rates increase. Convertible securities generally offer lower interest or dividend yields than non-convertible securities of similar quality.

Counterparty Credit Risk – The Fund makes investments in financial instruments and OTC-traded derivatives involving counterparties to gain exposure to a particular group of securities, index or asset class without actually purchasing those securities or investments, or to hedge a position. Through these investments, the Fund is exposed to credit risks that the counterparty may be unwilling or unable to make timely payments to meet its contractual obligations or may fail to return holdings that are subject to the agreement with the counterparty. If the counterparty becomes bankrupt or defaults on its payment obligations to the Fund, the Fund may not receive the full amount that it is entitled to receive. If this occurs, the value of your shares in the Fund will decrease.

Credit Risk – The Fund could lose money if the issuer of a bond or a counterparty to a derivatives transaction is unable to repay interest and principal on time or defaults. The issuer of a bond could also suffer a decrease in quality rating, which would affect the volatility of the price and liquidity of the bond.

Derivatives Risk – Derivatives may pose risks in addition to and greater than those associated with investing directly in securities or other investments, including risks relating to leverage, imperfect correlations with underlying investments or the Fund’s other portfolio holdings, high price volatility, lack of availability, counterparty credit, liquidity and valuation. Their use is a highly specialized activity that involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. If the Investment Manager is incorrect about its expectations of market conditions, the use of derivatives could also result in a loss, which in some cases may be unlimited. Some derivatives may trade in OTC markets, which are largely unregulated. Certain risks also are specific to the derivatives in which the Fund invests.

Swap Agreements Risk – Swap agreements relate to a contract among the Fund and a counterparty to exchange the return of the pre-determined underlying investment (such as the rate of return of the underlying index). Risks associated with the use of swap agreements are different from those associated with ordinary portfolio securities transactions, due in part to the fact they could be considered illiquid and currently usually trade on the OTC market, which is an unregulated market. Swaps are particularly subject to counterparty credit, correlation, valuation, liquidity and leveraging risks. Certain standardized swaps are subject to mandatory central clearing. Central clearing is expected to reduce counterparty risk and increase liquidity, but central clearing does not make swap transactions risk-free.

Futures Contracts Risk – Futures contracts are typically exchange traded contracts that call for the future delivery of an asset at a certain price and date, or cash settlement of the terms of the contract. Risks of futures contracts may be caused by an imperfect correlation between movements in the price of the instruments and the price of the underlying securities. In addition, there is the risk that the Fund may not be able to enter into a closing transaction because of an illiquid market. Exchanges can limit the number of positions that can be held or controlled by the Fund or its Investment Manager, thus limiting the ability to implement the Fund strategies. Futures markets are highly volatile and the use of futures may increase the volatility of the Fund’s NAV. Futures are also subject to leverage risk and to liquidity risk.

Options Risk – Options or options on futures contracts give the holder of the option the right to buy (or to sell) a position in a security or in a contract to the writer of the option, at a certain price. They are subject to correlation risk because there may be an imperfect correlation between the options and the securities markets that cause a given transaction to fail to achieve its objectives. The successful use of options depends on the Investment Manager’s ability to predict correctly future price fluctuations and the degree of correlation between the options and securities markets. Exchanges can limit the number of positions that can be held or controlled by the Fund or its Investment Manager, thus limiting the ability to implement the Fund strategies. Options are also particularly subject to leverage risk and can be subject to liquidity 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.

Growth Stocks Risk – Growth stocks typically invest a high portion of their earnings back into their business and may lack the dividend yield that could cushion their decline in a market downturn. Growth stocks may be more volatile than other stocks because they are more sensitive to investor perceptions regarding the growth potential of the issuing company.

Interest Rate Risk – Investments in fixed-income securities are subject to the possibility that interest rates could rise sharply, causing the value of the Fund’s securities and share price to decline. Fixed-income securities with longer durations are subject to more volatility than those with shorter durations.

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.

Investments in Loans Risk – Investments in loans involve special types of risks, including credit risk, interest rate risk, counterparty risk and prepayment risk. Loans may offer a fixed or floating interest rate. Loans are often generally below investment grade and may be unrated. Loans may be difficult to value and some can be subject to liquidity risk.

Leverage Risk – The Fund’s use of leverage, through instruments such as derivatives, may cause the Fund to be more volatile and riskier than if it had not been leveraged.

Liquidity and Valuation Risk – In certain circumstances, it may be difficult for the Fund to purchase and sell particular investments within a reasonable time at a fair price, or the price at which it has been valued by the Investment Manager for purposes of the Fund’s net asset value, causing the Fund to be less liquid and unable to realize what the Investment Manager believes should be the price of the investment.

Management Risk – The Fund is actively managed, which means that investment decisions are made based on investment views. There is no guarantee that the investment views will be successful. Furthermore, active trading that can accompany active management, 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.

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. Moreover, changing economic, political or financial market conditions in one country or geographic region could adversely impact the market value of the securities held by the Fund in a different country or geographic region.

Mid-Capitalization Securities Risk – The Fund is subject to the risk that medium-capitalization stocks may underperform other segments of the equity market or the equity market as a whole. Securities of medium-capitalization companies may experience more price volatility, greater spreads between their bid and ask prices, lower trading volumes, and cyclical or static growth prospects. Medium-capitalization companies often have limited product lines, markets or financial resources, and may therefore be more vulnerable to adverse developments than larger capitalization companies.

Preferred Securities Risk – A company’s preferred stock generally pays dividends only after the company makes required payments to holders of its bonds and other debt. For this reason, the value of preferred stock will usually react more strongly than bonds and other debt to actual or perceived changes in the company’s financial condition or prospects.

Prepayment Risk – Securities subject to prepayment risk generally offer less potential for gains when interest rates decline, because issuers of the securities may be able to prepay the principal due on the securities, and may offer a greater potential for income loss when interest rates rise.

Regulatory and Legal Risk – U.S. and other regulators and governmental agencies may implement additional regulations and legislators may pass new laws that affect the investments held by the Fund, the strategies used by the Fund or the level of regulation or taxation applying to the Fund (such as regulations related to investments in derivatives). These may impact the investment strategies, performance, costs and operations of the Fund or taxation of shareholders.

 

Restricted Securities Risk – Restricted securities generally cannot be sold to the public and may involve a high degree of business, financial and liquidity risk, which may result in substantial losses to the Fund.
Risk Lose Money [Text] 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 [Text] 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 [Text Block] 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 Class A share performance from year to year and by showing how the Fund’s average annual returns for one, five, and ten years 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.guggenheiminvestments.com or by calling 1-800-820-0888.

The bar chart does not reflect the impact of the sales charge applicable to Class A shares which, if reflected, would lower the returns shown.

Effective April 30, 2013, certain changes were made to the Fund’s investment objective and principal investment strategies.
Performance Information Illustrates Variability of Returns [Text] 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 Class A share performance from year to year and by showing how the Fund’s average annual returns for one, five, and ten years have compared to those of a broad measure of market performance.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1-800-820-0888
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.guggenheiminvestments.com
Performance Past Does Not Indicate Future [Text] 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 Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads

The bar chart does not reflect the impact of the sales charge applicable to Class A shares which, if reflected, would lower the returns shown.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarter Return

2Q 2003 28.83%

  

Lowest Quarter Return

4Q 2008 -25.69%

 

     

Year-to-Date Return

1Q 2013 8.29%

    
Year to Date Return, Label rr_YearToDateReturnLabel

Year-to-Date Return
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2013
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 8.29%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel

Highest Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2003
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 28.83%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel

Lowest Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (25.69%)
Performance Table Heading rr_PerformanceTableHeading

AVERAGE ANNUAL TOTAL RETURNS

(for the periods ended December 31, 2012)
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads

The bar chart does not reflect the impact of the sales charge applicable to Class A shares which, if reflected, would lower the returns shown.
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. After-tax returns are shown for Class A only. After-tax returns for Class B and C will vary.
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. After-tax returns are shown for Class A only. After-tax returns for Class B and C will vary.
Guggenheim StylePlus - Mid Growth Fund | Guggenheim StylePlus & Mid Growth Institutional Fund
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading

Guggenheim StylePlus – Mid Growth Institutional Fund (formerly, Mid Cap Growth Institutional Fund)
Objective [Heading] rr_ObjectiveHeading

INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

Guggenheim StylePlus – Mid Growth Institutional Fund seeks long-term growth of capital.
Expense [Heading] rr_ExpenseHeading

FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption

SHAREHOLDER FEES (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption

ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading

PORTFOLIO TURNOVER
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

The 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 149% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 149.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts

you may pay if you buy and hold shares of the Fund.
Acquired Fund Fees and Expenses, Based on Estimates [Text] rr_AcquiredFundFeesAndExpensesBasedOnEstimates

Acquired Fund Fees and Expenses are based on estimated amounts for the current fiscal year.
Expense Example [Heading] rr_ExpenseExampleHeading

EXAMPLE
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the 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:
Strategy [Heading] rr_StrategyHeading

PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund seeks to exceed the total return of the Russell Midcap Growth Index (the “Index”). The Fund pursues its objective by investing, under normal market conditions, in: (i) equity securities issued by companies that have market capitalizations within the range of companies in the Index; (ii) equity derivatives that, when purchased, provide exposure to equity securities of companies with market capitalizations usually within the range of companies in the Index; (iii) equity derivatives based on mid-capitalization indices, growth indices and/or other indices and other derivatives deemed appropriate by Security Investors, LLC, also known as Guggenheim Investments (the “Investment Manager”); (iv) fixed income securities; and (v) cash investments to collateralize derivatives positions. As of March 31, 2013, the Index consisted of securities of companies with market capitalizations that ranged from $321.4 to $44.0 billion.

 

Equity securities in which the Fund may invest include common stocks, rights and warrants, and American Depository Receipts (“ADRs”). Derivatives in which the Fund may invest include options, futures contracts, swap agreements, and forward contracts. Fixed income securities and other securities in which the Fund may invest include debt securities selected from a variety of sectors and credit qualities (principally, investment grade), principally, corporate bonds, participations in and assignments of syndicated bank loans, asset-backed securities (including mortgage-backed securities and structured finance investments), U.S. government and agency securities (including those not backed by the full faith and credit of the U.S. government), mezzanine and preferred securities, commercial paper, zero-coupon bonds, non-registered or restricted securities (consisting of securities originally issued in reliance on Rule 144A and Regulation S), step-up securities (such as step-up bonds) and convertible securities that Guggenheim Investments believes offer attractive yield and/or capital appreciation potential. The Fund may invest in securities listed, traded or dealt in other countries. The Fund may hold securities of any duration or maturity. Fixed income securities in which the Fund may invest may pay fixed or variable rates of interest. The Fund may invest in a variety of investment vehicles, principally closed-end funds, exchange traded funds (“ETFs”) and other mutual funds.

 

Allocation decisions within the asset categories are at the discretion of the Investment Manager and are based on the Investment Manager’s judgment of the current investment environment (including market volatility), the attractiveness of each asset category, the correlations among Index components, individual positions or each asset category, and expected returns. In selecting investments for the Fund, the Investment Manager uses quantitative analysis, credit research and due diligence on issuers, regions and sectors to select the Fund’s investments and other proprietary strategies to identify securities and other assets that, in combination, are expected to contribute to exceeding the total return of the Index. Derivative instruments may be used extensively by the Investment Manager to maintain exposure to the equity and fixed income markets, to hedge the Fund’s portfolio, or to increase returns. The Investment Manager may determine to sell a security for several reasons including the following: (1) to meet redemption requests; (2) to close-out or unwind derivatives transactions; (3) to realize gains; or (4) if market conditions change.

 

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.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration

Under normal market conditions, in: (i) equity securities issued by companies that have market capitalizations within the range of companies in the Index; (ii) equity derivatives that, when purchased, provide exposure to equity securities of companies with market capitalizations usually within the range of companies in the Index; (iii) equity derivatives based on mid-capitalization indices, growth indices and/or other indices and other derivatives deemed appropriate by Security Investors, LLC, also known as Guggenheim Investments (the “Investment Manager”); (iv) fixed income securities; and (v) cash investments to collateralize derivatives positions.
Risk [Heading] rr_RiskHeading

PRINCIPAL RISKS
Risk Narrative [Text Block] 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.

 

Asset-Backed and Mortgage-Backed Securities Risk – Investors in asset-backed securities, including mortgage-backed securities and structured finance investments, generally receive payments that are part interest and part return of principal. These payments may vary based on the rate at which the underlying borrowers pay off their loans. Some asset-backed securities, including mortgage-backed securities, may have structures that make their reaction to interest rates and other factors difficult to predict, making their prices very volatile and they are subject to liquidity risk.

 

Convertible Securities Risk – Convertible securities may be subordinate to other securities. The total return for a convertible security depends, in part, upon the performance of the underlying security into which it can be converted. The value of convertible securities tends to decline as interest rates increase. Convertible securities generally offer lower interest or dividend yields than non-convertible securities of similar quality.

 

Counterparty Credit Risk – The Fund makes investments in financial instruments and OTC-traded derivatives involving counterparties to gain exposure to a particular group of securities, index or asset class without actually purchasing those securities or investments, or to hedge a position. Through these investments, the Fund is exposed to credit risks that the counterparty may be unwilling or unable to make timely payments to meet its contractual obligations or may fail to return holdings that are subject to the agreement with the counterparty. If the counterparty becomes bankrupt or defaults on its payment obligations to the Fund, the Fund may not receive the full amount that it is entitled to receive. If this occurs, the value of your shares in the Fund will decrease.

 

Credit Risk – The Fund could lose money if the issuer of a bond or a counterparty to a derivatives transaction is unable to repay interest and principal on time or defaults. The issuer of a bond could also suffer a decrease in quality rating, which would affect the volatility of the price and liquidity of the bond.

 

Derivatives Risk – Derivatives may pose risks in addition to and greater than those associated with investing directly in securities or other investments, including risks relating to leverage, imperfect correlations with underlying investments or the Fund’s other portfolio holdings, high price volatility, lack of availability, counterparty credit, liquidity and valuation. Their use is a highly specialized activity that involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. If the Investment Manager is incorrect about its expectations of market conditions, the use of derivatives could also result in a loss, which in some cases may be unlimited. Some derivatives may trade in OTC markets, which are largely unregulated. Certain risks also are specific to the derivatives in which the Fund invests.

 

Swap Agreements Risk – Swap agreements relate to a contract among the Fund and a counterparty to exchange the return of the pre-determined underlying investment (such as the rate of return of the underlying index). Risks associated with the use of swap agreements are different from those associated with ordinary portfolio securities transactions, due in part to the fact they could be considered illiquid and currently usually trade on the OTC market, which is an unregulated market. Swaps are particularly subject to counterparty credit, correlation, valuation, liquidity and leveraging risks. Certain standardized swaps are subject to mandatory actual central clearing. Central clearing is expected to reduce counterparty credit risk and increase liquidity, but central clearing does not make swap transactions risk free.
  
Futures Contracts Risk – Futures contracts are typically exchange traded contracts that call for the future delivery of an asset at a certain price and date, or cash settlement of the terms of the contract. Risks of futures contracts may be caused by an imperfect correlation between movements in the price of the instruments and the price of the underlying securities. In addition, there is the risk that the Fund may not be able to enter into a closing transaction because of an illiquid market. Exchanges can limit the number of positions that can be held or controlled by the Fund or its Investment Manager, thus limiting the ability to implement the Fund strategies. Futures markets are highly volatile and the use of futures may increase the volatility of the Fund’s NAV. Futures are also subject to leverage risk and to liquidity risk.
  
Options Risk – Options or options on futures contracts give the holder of the option the right to buy (or to sell) a position in a security or in a contract to the writer of the option, at a certain price. They are subject to correlation risk because there may be an imperfect correlation between the options and the securities markets that cause a given transaction to fail to achieve its objectives. The successful use of options depends on the Investment Manager’s ability to predict correctly future price fluctuations and the degree of correlation between the options and securities markets. Exchanges can limit the number of positions that can be held or controlled by the Fund or its Investment Manager, thus limiting the ability to implement the Fund strategies. Options are also particularly subject to leverage risk and can be subject to liquidity 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.

 

Growth Stocks Risk – Growth stocks typically invest a high portion of their earnings back into their business and may lack the dividend yield that could cushion their decline in a market downturn. Growth stocks may be more volatile than other stocks because they are more sensitive to investor perceptions regarding the growth potential of the issuing company.

 

Interest Rate Risk – Investments in fixed-income securities are subject to the possibility that interest rates could rise sharply, causing the value of the Fund’s securities and share price to decline. Fixed-income securities with longer durations are subject to more volatility than those with shorter durations.

 

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.

 

Investments in Loans Risk – Investments in loans involve special types of risks, including credit risk, interest rate risk, counterparty risk and prepayment risk. Loans may offer a fixed or floating interest rate. Loans are often generally below investment grade and may be unrated. Loans may be difficult to value and some can be subject to liquidity risk.

 

Leverage Risk – The Fund’s use of leverage, through instruments such as derivatives, may cause the Fund to be more volatile and riskier than if it had not been leveraged.

 

Liquidity and Valuation Risk – In certain circumstances, it may be difficult for the Fund to purchase and sell particular investments within a reasonable time at a fair price, or the price at which it has been valued by the Investment Manager for purposes of the Fund’s net asset value, causing the Fund to be less liquid and unable to realize what the Investment Manager believes should be the price of the investment.

 

Management Risk – The Fund is actively managed, which means that investment decisions are made based on investment views. There is no guarantee that the investment views will be successful. Furthermore, active trading that can accompany active management, 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.

 

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. Moreover, changing economic, political or financial market conditions in one country or geographic region could adversely impact the market value of the securities held by the Fund in a different country or geographic region.

 

Mid-Capitalization Securities Risk – The Fund is subject to the risk that medium-capitalization stocks may underperform other segments of the equity market or the equity market as a whole. Securities of medium-capitalization companies may experience more price volatility, greater spreads between their bid and ask prices, lower trading volumes, and cyclical or static growth prospects. Medium-capitalization companies often have limited product lines, markets or financial resources, and may therefore be more vulnerable to adverse developments than larger capitalization companies.

 

Preferred Securities Risk – A company’s preferred stock generally pays dividends only after the company makes required payments to holders of its bonds and other debt. For this reason, the value of preferred stock will usually react more strongly than bonds and other debt to actual or perceived changes in the company’s financial condition or prospects.

 

Prepayment Risk – Securities subject to prepayment risk generally offer less potential for gains when interest rates decline, because issuers of the securities may be able to prepay the principal due on the securities, and may offer a greater potential for income loss when interest rates rise.

 

Regulatory and Legal Risk – U.S. and other regulators and governmental agencies may implement additional regulations and legislators may pass new laws that affect the investments held by the Fund, the strategies used by the Fund or the level of regulation or taxation applying to the Fund (such as regulations related to investments in derivatives). These may impact the investment strategies, performance, costs and operations of the Fund or taxation of shareholders.

 

Restricted Securities Risk – Restricted securities generally cannot be sold to the public and may involve a high degree of business, financial and liquidity risk, which may result in substantial losses to the Fund.
Risk Lose Money [Text] 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 [Text] rr_RiskNotInsuredDepositoryInstitution

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 [Text Block] rr_PerformanceNarrativeTextBlock

The following chart and table provide some indication of the risks of investing in the Fund by showing changes in the performance of the Fund’s Class A shares from year to year and by showing how the Fund’s average annual returns for the Fund’s Class A shares for one, five, and ten years 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.guggenheiminvestments.com or by calling 1-800-820-0888.

 

The bar chart does not reflect the impact of the sales charge applicable to Class A shares which, if reflected, would lower the returns shown. Although the table reflects the sales charge, Institutional Class shares are not subject to the sales charge.

 

Because Institutional Class shares have not operated for a full calendar year as of the date of this Prospectus, the figures shown provide performance for Class A shares of the Fund. Class A shares are not offered in this Prospectus. Institutional Class shares would have substantially similar returns as the Class A shares because Institutional Class shares represent interests in the same portfolio of securities. Annual returns would differ only to the extent that Institutional Class shares have different expenses.

 

Effective April 30, 2013, certain changes were made to the Fund’s investment objective and principal investment strategies.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns

The following chart and table provide some indication of the risks of investing in the Fund by showing changes in the performance of the Fund’s Class A shares from year to year and by showing how the Fund’s average annual returns for the Fund’s Class A shares for one, five, and ten years have compared to those of a broad measure of market performance.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1-800-820-0888
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.guggenheiminvestments.com
Performance Past Does Not Indicate Future [Text] 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 Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads

The bar chart does not reflect the impact of the sales charge applicable to Class A shares which, if reflected, would lower the returns shown.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarter Return

2Q 2003 28.83%

  

Lowest Quarter Return

4Q 2008 -25.69%

Year-to-Date Return

1Q 2013 8.29% (Class A shares) and 8.38% (Institutional Class shares)
Year to Date Return, Label rr_YearToDateReturnLabel

Year-to-Date Return
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2013
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 8.38%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel

Highest Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2003
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 28.83%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel

Lowest Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (25.69%)
Performance Table Heading rr_PerformanceTableHeading

AVERAGE ANNUAL TOTAL RETURNS

(for the periods ended December 31, 2012)
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads

The bar chart does not reflect the impact of the sales charge applicable to Class A shares which, if reflected, would lower the returns shown. Although the table reflects the sales charge, Institutional Class shares are not subject to the sales charge.
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. After-tax returns are shown for Class A only. After-tax returns for Class B and C will vary.
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.
Guggenheim StylePlus - Mid Growth Fund | Class A | Guggenheim StylePlus & Mid Growth Institutional Fund Class A,B And C
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 4.75%
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees rr_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_Component1OtherExpensesOverAssets 0.62%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.04% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.66%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 636
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 974
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,334
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,347
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 636
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 974
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,334
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 2,347
Annual Return 2003 rr_AnnualReturn2003 56.00%
Annual Return 2004 rr_AnnualReturn2004 9.60%
Annual Return 2005 rr_AnnualReturn2005 7.00%
Annual Return 2006 rr_AnnualReturn2006 4.60%
Annual Return 2007 rr_AnnualReturn2007 (9.90%)
Annual Return 2008 rr_AnnualReturn2008 (40.50%)
Annual Return 2009 rr_AnnualReturn2009 43.00%
Annual Return 2010 rr_AnnualReturn2010 23.00%
Annual Return 2011 rr_AnnualReturn2011 (4.80%)
Annual Return 2012 rr_AnnualReturn2012 14.90%
Label rr_AverageAnnualReturnLabel

Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 9.46%
5 Years rr_AverageAnnualReturnYear05 1.53%
10 Years rr_AverageAnnualReturnYear10 6.40%
Guggenheim StylePlus - Mid Growth Fund | Class A | Guggenheim StylePlus & Mid Growth Institutional Fund
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_Component1OtherExpensesOverAssets 0.62%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.04% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.41%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 144
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 446
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 771
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,691
Annual Return 2003 rr_AnnualReturn2003 56.00%
Annual Return 2004 rr_AnnualReturn2004 9.60%
Annual Return 2005 rr_AnnualReturn2005 7.00%
Annual Return 2006 rr_AnnualReturn2006 4.60%
Annual Return 2007 rr_AnnualReturn2007 (9.90%)
Annual Return 2008 rr_AnnualReturn2008 (40.50%)
Annual Return 2009 rr_AnnualReturn2009 43.00%
Annual Return 2010 rr_AnnualReturn2010 23.00%
Annual Return 2011 rr_AnnualReturn2011 (4.80%)
Annual Return 2012 rr_AnnualReturn2012 14.90%
Label rr_AverageAnnualReturnLabel

Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 9.46%
5 Years rr_AverageAnnualReturnYear05 1.53%
10 Years rr_AverageAnnualReturnYear10 6.40%
Guggenheim StylePlus - Mid Growth Fund | Class B | Guggenheim StylePlus & Mid Growth Institutional Fund Class A,B And C
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none [2]
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOfferingPrice 5.00%
Management Fees rr_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_Component1OtherExpensesOverAssets 1.20%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.04% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.99%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 802
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,224
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,772
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,995
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 302
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 924
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,572
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 2,995
Label rr_AverageAnnualReturnLabel

Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 8.27%
5 Years rr_AverageAnnualReturnYear05 1.44%
10 Years rr_AverageAnnualReturnYear10 6.41%
Guggenheim StylePlus - Mid Growth Fund | Class C | Guggenheim StylePlus & Mid Growth Institutional Fund Class A,B And C
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees rr_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_Component1OtherExpensesOverAssets 0.70%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.04% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.49%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 352
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 776
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,326
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,826
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 252
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 776
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,326
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 2,826
Label rr_AverageAnnualReturnLabel

Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 12.94%
5 Years rr_AverageAnnualReturnYear05 1.91%
10 Years rr_AverageAnnualReturnYear10 6.23%
Guggenheim StylePlus - Mid Growth Fund | After Taxes On Distributions | Class A | Guggenheim StylePlus & Mid Growth Institutional Fund Class A,B And C
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel

Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 9.46%
5 Years rr_AverageAnnualReturnYear05 1.50%
10 Years rr_AverageAnnualReturnYear10 5.51%
Guggenheim StylePlus - Mid Growth Fund | After Taxes On Distributions | Class A | Guggenheim StylePlus & Mid Growth Institutional Fund
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel

Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 9.46%
5 Years rr_AverageAnnualReturnYear05 1.50%
10 Years rr_AverageAnnualReturnYear10 5.51%
Guggenheim StylePlus - Mid Growth Fund | After Taxes On Distributions And Sales | Class A | Guggenheim StylePlus & Mid Growth Institutional Fund Class A,B And C
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel

Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 6.15%
5 Years rr_AverageAnnualReturnYear05 1.29%
10 Years rr_AverageAnnualReturnYear10 5.44%
Guggenheim StylePlus - Mid Growth Fund | After Taxes On Distributions And Sales | Class A | Guggenheim StylePlus & Mid Growth Institutional Fund
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel

Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 6.15%
5 Years rr_AverageAnnualReturnYear05 1.29%
10 Years rr_AverageAnnualReturnYear10 5.44%
Guggenheim StylePlus - Mid Growth Fund | Russell Midcap Growth Index | Guggenheim StylePlus & Mid Growth Institutional Fund Class A,B And C
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel

Russell Midcap Growth Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 15.81%
5 Years rr_AverageAnnualReturnYear05 3.23%
10 Years rr_AverageAnnualReturnYear10 10.32%
Guggenheim StylePlus - Mid Growth Fund | Russell Midcap Growth Index | Guggenheim StylePlus & Mid Growth Institutional Fund
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel

Russell Midcap Growth Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 15.81%
5 Years rr_AverageAnnualReturnYear05 3.23%
10 Years rr_AverageAnnualReturnYear10 10.32%
[1] Acquired Fund Fees and Expenses are based on estimated amounts for the current fiscal year.
[2] Closed to new subscriptions