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Risk Return [Abstract] rr_RiskReturnAbstract  
ProspectusDate rr_ProspectusDate Aug. 01, 2012
Government Long Bond 1.2x Strategy Fund (Second Prospectus Summary) | Government Long Bond 1.2x Strategy Fund
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Government Long Bond 1.2x Strategy Fund
Risk/Return, Supplement Text Block ck0000899148_SupplementTextBlock IMPORTANT INFORMATION ABOUT THE FUND

The Government Long Bond 1.2x Strategy Fund (the "Fund") is very different from
most other mutual funds in that it seeks daily leveraged investment results. As
a result, the Fund may be riskier than alternatives that do not use leverage
because the performance of an investment in the Fund is magnified.

The effect of leverage on the Fund will generally cause the Fund's performance
to not correspond to the performance of the Fund's benchmark (as described
below) over a period of time greater than one day. This means that the return of
the Fund for a period of longer than a single trading day will be the result of
each day's compounded returns over the period, which will likely differ from the
return of the Fund's benchmark for that period. As a consequence, especially in
periods of market volatility, the path or trend of the benchmark during the
longer period may be at least as important to the Fund's cumulative return for
the longer period as the cumulative return of the benchmark for the relevant
longer period. Further, the return for investors who invest for a period longer
than a single trading day will not be the product of the return of the Fund's
stated investment goal (e.g., 1.2x) and the cumulative performance of the
benchmark (as defined below).

The Fund is not suitable for all investors. The Fund should be utilized only by
investors who (a) understand the risks associated with the use of leverage,
(b) understand the consequences of seeking daily leveraged investment results,
and (c) intend to actively monitor and manage their investments. Investors who
do not meet these criteria should not buy shares of the Fund. An investment in
the Fund is not a complete investment program.
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock The Fund seeks to provide investment results that correspond, before fees and
expenses, to a benchmark for U.S. government securities on a daily basis. The
Fund's current benchmark is 120% of the daily price movement of the Long
Treasury Bond. The Long Treasury Bond is the U.S. Treasury bond with the longest
maturity, which is currently 30 years. The price movement of the Long Treasury
Bond is based on the daily price change of the most recently issued Long
Treasury Bond. The Fund does not seek to achieve its investment objective over a
period of time greater than one day.
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
A-Class Shares or C-Class 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 certain funds in the Guggenheim Investments family of funds.
More information about these and other discounts is available from your financial
professional and under the "Sales Charges" section on page 297 of this Prospectus
and in the "A-Class Shares - Initial Sales Charges, Reductions, and Waivers"
section beginning on page 108 of the Fund's Statement of Additional Information
(the "SAI").
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
Total 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 2,322% of the average value of its portfolio. The Fund's portfolio
turnover rate is calculated without regard to cash instruments or derivatives.
If such instruments were included, the Fund's portfolio turnover rate might be
significantly higher.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 2322.00%
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 certain funds in the Guggenheim Investments family of funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount 100,000
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 your actual costs may
be higher or lower, based on these assumptions your costs would be:
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption You would pay the following expenses if you did not redeem your shares:
Strategy [Heading] rr_StrategyHeading PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock The Fund employs as its investment strategy a program of investing in U.S. government
securities and derivative instruments, which primarily consist of futures contracts,
interest rate swaps, and options on securities and futures contracts. Futures and
options contracts, and interest rate swaps, if used properly, may enable the Fund to
meet its objective by increasing the Fund's exposure to the securities included in
its benchmark or to securities whose performance is highly correlated to its benchmark.
The Fund's use of derivatives and the leveraged investment exposure created by such
use is expected to be significant. Certain of the Fund's derivative investments may
be traded in the over-the-counter ("OTC") market. Under normal circumstances, the Fund
will invest at least 80% of its net assets, plus any borrowings for investment purposes,
in fixed income securities issued by the U.S. government (and derivatives thereof).
Some of the Fund's U.S. government securities, or cash equivalents, will be used to
collateralize its derivative positions. The Fund also may invest in zero coupon U.S.
Treasury bonds and enter into repurchase agreements with counterparties that are deemed
to present acceptable credit risks. In an effort to ensure that the Fund is fully
invested on a day-to-day basis, the Fund may conduct any necessary trading activity at
or just prior to the close of the U.S. financial markets. The Fund is non-diversified
and, therefore, may invest a greater percentage of its assets in a particular issuer
in comparison to a diversified fund.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock As with all mutual funds, a shareholder is subject to the risk that his or her
investment could lose money. In addition to this risk, the Fund is subject to a
number of additional risks that may affect the value of its shares, including:

Active Trading Risk - Active trading, also called "high portfolio turnover," may
result in higher brokerage costs or mark-up charges, which may negatively affect
Fund performance and result in short-term capital gains, which have a negative
tax effect. Large movements of assets into and out of the Fund due to active
trading also may adversely affect the Fund's ability to achieve its investment
objective.

Correlation and Compounding Risk - A number of factors may affect the Fund's
ability to achieve a high degree of correlation with its benchmark, and there
can be no guarantee that the Fund will achieve a high degree of correlation.
Failure to achieve a high degree of correlation may prevent the Fund from
achieving its investment objective. The risk of the Fund not achieving its
daily investment objective will be more acute when the Long Treasury Bond has
an extreme one-day movement approaching 50%. In addition, as a result of
compounding, the Fund's performance for periods greater than one day is likely
to be either greater than or less than the performance of the Long Treasury Bond
times the stated multiple in the Fund's investment objective, before accounting
for fees and Fund expenses.
  
Compounding affects all investments, but has a more significant impact on a
leveraged benchmark fund. In general, particularly during periods of higher
benchmark volatility, compounding will cause longer-term results to be more or
less than the return of the Fund's benchmark. This effect becomes more
pronounced as volatility increases.

Fund performance for periods greater than one day can be estimated given any set
of assumptions for the following factors: (a) the performance of the Long
Treasury Bond; (b) volatility of the Long Treasury Bond; (c) financing rates
associated with leverage; (d) other Fund expenses; and (e) period of time. The
chart below illustrates the impact of two principal factors - volatility and
index performance - on Fund performance. The chart shows estimated Fund returns
for a number of combinations of performance and volatility over a one-year
period. Performance shown in the chart assumes: (a) no Fund expenses; and (b) a
cost of leverage of zero percent. If Fund expenses were included, the Fund's
performance would be lower than shown.

Areas shaded lighter represent those scenarios where the Fund can be expected to
return more than 120% of the performance of the Long Treasury Bond; conversely,
areas shaded darker represent those scenarios where the Fund can be expected to
return less than 120% of the performance of the Long Treasury Bond.

Index Performance                      Annualized Volatility                 
1x            1.2x       10%        25%        50%        75%        100%   
-60%         -72%       -67%       -67%       -68%       -69%       -71%  
-50%         -60%       -57%       -57%       -58%       -60%       -62%  
-40%         -48%       -46%       -46%       -48%       -49%       -51%  
-30%         -36%       -35%       -35%       -37%       -39%       -42%  
-20%         -24%       -24%       -25%       -25%       -28%       -32%  
-10%         -12%       -12%       -13%       -15%       -18%       -22%  
  0%           0%         0%         0%        -3%        -6%       -12%  
10%          12%        12%        11%         9%         5%        -1%  
20%          24%        24%        24%        20%        18%        11%  
30%          36%        37%        36%        32%        28%        21%  
40%          48%        49%        48%        45%        40%        32%  
50%          60%        62%        61%        58%        53%        43%  
60%          72%        76%        75%        71%        65%        56%  

The Long Treasury Bond's annualized historical volatility rate for the five year
period ended June 30, 2012 is 18.82%. The Long Treasury Bond's highest one-year
volatility rate during the five year period is 25.13%. The Long Treasury Bond's
annualized performance for the five year period ended June 30, 2012 is 12.70%.

The historical volatility and performance of the Long Treasury Bond are not
indications of what the Long Treasury Bond volatility and performance will be in
the future.

Counterparty Credit Risk - The Fund may invest in financial instruments
involving counterparties that attempt 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. The Fund's use of such financial
instruments, including swap agreements, involves risks that are different from
those associated with ordinary portfolio securities transactions. For example,
if a swap agreement counterparty defaults on its payment obligations to the Fund,
this default will cause the value of your investment in the Fund to decrease.
Swap agreements also may be considered to be illiquid. Similarly, if the credit
quality of an issuer or guarantor of a debt instrument improves, this change may
adversely affect the value of the Fund's investment.

Derivatives Risk - The Fund's investments in derivatives may pose risks in
addition to those associated with investing directly in securities or other
investments, including illiquidity of the derivatives, imperfect correlations
with underlying investments or the Fund's other portfolio holdings, lack of
availability and counterparty risk. When used to generate leveraged exposure,
the Fund's investments in derivatives may expose the Fund to potentially
dramatic losses (or gains) in the value of the derivative instruments. The Fund
could lose more than the principal amount invested.

Early Closing Risk - The Fund is subject to the risk that unanticipated early
closings of securities exchanges and other financial markets may result in the
Fund's inability to buy or sell securities or other financial instruments on
that day and may cause the Fund to incur substantial trading losses.
  
Fixed Income Risk - The Fund's investments in fixed income securities will
change in value in response to interest rate changes and other factors, such as
the perception of the issuer's creditworthiness. For example, the value of fixed
income securities will generally decrease when interest rates rise, which may
cause the value of the Fund to decrease. In addition, the Fund's investments in
fixed income securities with longer maturities will fluctuate more in response
to interest rate changes.

Leveraging Risk - The Fund achieves leveraged exposure to the Long Treasury Bond
through the use of derivative instruments. The more the Fund invests in
leveraged instruments, the more this leverage will magnify any losses on those
investments. The Fund's investment in these instruments generally requires a
small investment relative to the amount of investment exposure assumed. As a
result, such investments may give rise to losses that exceed the amount invested
in those instruments. Since the Fund's investment strategy involves consistently
applied leverage, the value of the Fund's shares will tend to increase or
decrease more than the value of any increase or decrease in the Long Treasury
Bond. Leverage also will have the effect of magnifying tracking error.

Liquidity 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. While the Fund only intends to invest in liquid futures, options,
forwards and swap contracts, under certain market conditions, such as when the
market makes a "limit move," it may be difficult or impossible for the Fund to
liquidate such investments. In addition, the ability of the Fund to assign an
accurate daily value to certain investments may be difficult, and the Advisor
may be required to fair value the investments.

Market Risk - The Fund's investments in securities and derivatives, in general,
are subject to market risks that may cause their prices, and therefore the
Fund's value, to fluctuate over time. An investment in the Fund may lose money.

Non-Diversification Risk - The Fund is considered non-diversified and can invest
a greater portion of its assets in securities of individual issuers than a
diversified fund. As a result, changes in the market value of a single security
could cause greater fluctuations in the value of Fund shares than would occur in
a diversified fund.

OTC Trading Risk - Certain of the derivatives in which the Fund may invest may
be traded (and privately negotiated) in the OTC market. While the OTC
derivatives market is the primary trading venue for many derivatives, it is
largely unregulated. As a result and similar to other privately negotiated
contracts, the Fund is subject to counterparty credit risk with respect to such
derivative contracts.

Passive Investment Risk - The Fund is not actively managed and the Advisor does
not attempt to take defensive positions in declining markets. Therefore, the
Fund may be subject to greater losses in a declining market than a fund that is
actively managed.

Repurchase Agreement Risk - The Fund's investment in repurchase agreements may
be subject to market and credit risk with respect to the collateral securing the
repurchase agreements. Investments in repurchase agreements also may be subject
to the risk that the market value of the underlying obligations may decline
prior to the expiration of the repurchase agreement term.

Tracking Error Risk - The Advisor may not be able to cause the Fund's
performance to correspond to that of the Fund's benchmark, either on a daily or
aggregate basis. Factors such as Fund expenses, imperfect correlation between
the Fund's investments and the Long Treasury Bond, rounding of share prices,
regulatory policies, high portfolio turnover rate, and the use of leverage all
contribute to tracking error. Tracking error may cause the Fund's performance to
be less than you expect.

Trading Halt Risk - If a trading halt occurs, the Fund may temporarily be unable
to purchase or sell securities, options or futures contracts. Such a trading
halt near the time the Fund prices its shares may limit the Fund's ability to
use leverage and may prevent the Fund from achieving its investment objective.
Risk Lose Money [Text] rr_RiskLoseMoney As with all mutual funds, a shareholder is subject to the risk that his or her investment could lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single security could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE INFORMATION
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The following bar chart shows the performance of the C-Class Shares of the Fund from
year to year. The variability of performance over time provides an indication of the
risks of investing in the Fund. The following table shows the average annual total
returns of the A-Class Shares and C-Class Shares of the Fund over different periods
of time in comparison to the performance of a broad-based market index. The figures
in the bar chart and table assume the reinvestment of dividends and capital gains
distributions but do not reflect sales charges. If they did, returns would be lower.
Of course, this past performance (before and after taxes) does not necessarily
indicate 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 Guggenheim Investments Client Services at
800-820-0888.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The variability of performance over time provides an indication of the risks of investing in the Fund.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800-820-0888
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.rydex-sgi.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart Narrative [Text Block] rr_BarChartNarrativeTextBlock The performance information shown below for C-Class Shares is based on a
calendar year. The year-to-date return for the period from January 1, 2012
through June 30, 2012 is 5.78%.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Highest Quarter Return                                Lowest Quarter Return
      (quarter ended 12/31/2008) 41.17%   (quarter ended 3/31/2009) -16.35%
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes reflects no deduction for fees, expenses or taxes
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock The after-tax returns presented in the table below are calculated using highest
historical individual federal marginal income tax rates and do not reflect the
impact of state and local taxes. Your actual after-tax returns will depend on
your specific tax situation and may differ from those shown below. After-tax
returns are not relevant to investors who hold shares of the Fund through
tax-deferred arrangements, such as 401(k) plans or individual retirement
accounts.
Caption rr_AverageAnnualReturnCaption AVERAGE ANNUAL TOTAL RETURN (for periods ended December 31, 2011)
Government Long Bond 1.2x Strategy Fund (Second Prospectus Summary) | Government Long Bond 1.2x Strategy Fund | Barclays Capital Long Treasury Bond Index
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Barclays Capital Long Treasury Bond Index (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 29.93%
5 Years rr_AverageAnnualReturnYear05 11.00%
10 Years rr_AverageAnnualReturnYear10 8.95%
Average Annual Returns, Since Inception Secondary ck0000899148_AverageAnnualReturnSinceInceptionSecondary 8.40%
Average Annual Returns, Inception Date Secondary ck0000899148_AverageAnnualReturnInceptionDateSecondary Mar. 31, 2004
Government Long Bond 1.2x Strategy Fund (Second Prospectus Summary) | Government Long Bond 1.2x Strategy Fund | A-Class
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 4.75%
Maximum Deferred Sales Charge (Load) (as a percentage of initial purchase price or current market value, whichever is less) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees rr_ManagementFeesOverAssets 0.50%
Distribution and/or Shareholder Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.45%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.20%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 591
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 838
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,103
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,860
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 35.81%
5 Years rr_AverageAnnualReturnYear05 11.08%
Since Inception rr_AverageAnnualReturnSinceInception 7.91%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 2004
Government Long Bond 1.2x Strategy Fund (Second Prospectus Summary) | Government Long Bond 1.2x Strategy Fund | A-Class | After Taxes on Distributions
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 34.70%
5 Years rr_AverageAnnualReturnYear05 9.98%
Since Inception rr_AverageAnnualReturnSinceInception 6.74%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 2004
Government Long Bond 1.2x Strategy Fund (Second Prospectus Summary) | Government Long Bond 1.2x Strategy Fund | A-Class | After Taxes on Distributions and Sales
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 23.12%
5 Years rr_AverageAnnualReturnYear05 8.90%
Since Inception rr_AverageAnnualReturnSinceInception 6.11%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 2004
Government Long Bond 1.2x Strategy Fund (Second Prospectus Summary) | Government Long Bond 1.2x Strategy Fund | C-Class
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of initial purchase price or current market value, whichever is less) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees rr_ManagementFeesOverAssets 0.50%
Distribution and/or Shareholder Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.45%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.95%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 298
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 612
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,052
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,275
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 198
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 612
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,052
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 2,275
Annual Return 2002 rr_AnnualReturn2002 18.21%
Annual Return 2003 rr_AnnualReturn2003 (2.66%)
Annual Return 2004 rr_AnnualReturn2004 8.64%
Annual Return 2005 rr_AnnualReturn2005 7.00%
Annual Return 2006 rr_AnnualReturn2006 (4.16%)
Annual Return 2007 rr_AnnualReturn2007 9.13%
Annual Return 2008 rr_AnnualReturn2008 48.54%
Annual Return 2009 rr_AnnualReturn2009 (31.96%)
Annual Return 2010 rr_AnnualReturn2010 9.40%
Annual Return 2011 rr_AnnualReturn2011 41.48%
Year to Date Return, Label rr_YearToDateReturnLabel year-to-date return
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Jun. 30, 2012
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 5.78%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2008
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 41.17%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2009
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (16.35%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 40.48%
5 Years rr_AverageAnnualReturnYear05 11.29%
10 Years rr_AverageAnnualReturnYear10 8.15%
Government Long Bond 1.2x Strategy Fund (Second Prospectus Summary) | Government Long Bond 1.2x Strategy Fund | C-Class | After Taxes on Distributions
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 39.68%
5 Years rr_AverageAnnualReturnYear05 10.47%
10 Years rr_AverageAnnualReturnYear10 7.19%
Government Long Bond 1.2x Strategy Fund (Second Prospectus Summary) | Government Long Bond 1.2x Strategy Fund | C-Class | After Taxes on Distributions and Sales
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 26.19%
5 Years rr_AverageAnnualReturnYear05 9.29%
10 Years rr_AverageAnnualReturnYear10 6.53%