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Tactical Offensive Equity Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Tactical Offensive Equity Fund
Objective [Heading] rr_ObjectiveHeading Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

Capital appreciation.
Expense [Heading] rr_ExpenseHeading Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold Fund shares.
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 148% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 148.00%
Expense Example [Heading] rr_ExpenseExampleHeading EXAMPLE
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the 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.
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Adviser Managed Strategy Component


Only persons who are clients of the Financial Adviser (as defined below) and who participate in the Adviser Managed Strategy should invest in the Fund. The Fund may not be purchased by any other investor. The Fund is designed to be a component of a broader strategy employed by a third party investment manager (Financial Adviser) for the benefit of its clients. The Financial Adviser seeks to take advantage of broad market changes by tactically shifting its clients' assets among the Fund, the Tactical Offensive Fixed Income Fund and a money market fund affiliated with the Fund, depending on the Financial Adviser's evaluation of current market conditions (Adviser Managed Strategy). The Financial Adviser is not the adviser to the Fund and is not affiliated with SEI Investments Management Corporation (SIMC), the adviser to the Fund. The Adviser Managed Strategy is based on models developed by the Financial Adviser and is not subject to the oversight of or input from SIMC.


When the Financial Adviser determines to reallocate its clients' assets to one or more of the other funds that compose the Adviser Managed Strategy, the Financial Adviser may request the redemption of a substantial portion of or all of the shares for which the Financial Adviser exercises investment discretion. In such an instance, the Financial Adviser's redemption request will cause the Fund to liquidate a substantial portion of or substantially all of its assets in order to fulfill the redemption request. If the Financial Adviser redeems all of the shares for which it exercises investment discretion, the Fund will no longer be an active component of the Adviser Managed Strategy. When the Fund is not an active component of the Adviser Managed Strategy, the Fund may invest up to 100% of its remaining assets in exchange-traded funds (ETFs) that are designed to track the performance of the broad U.S. equity market. The Fund could be invested in these types of investments for extended periods of time. At such times, SIMC will manage the assets of the Fund. SIMC, the Financial Adviser or one or more of their affiliates will be the only investors in the Fund when the Fund is not an active component of the Adviser Managed Strategy. Due to this strategy, the Fund may buy and sell securities and other instruments frequently.


Investment Strategy


Under normal circumstances, and when the Fund is an active component of the Adviser Managed Strategy, the Fund will invest at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in equity securities of U.S. and non-U.S. issuers of various market capitalizations and industries.


It is expected that the Fund will invest: (i) at least 50% of its assets in a portfolio of securities designed to track, before fees and expenses, the performance of one or more indexes that represent broad exposure to the U.S. equity market (U.S. Equity Index); (ii) up to 40% of its assets in a portfolio of securities designed to track, before fees and expenses, the performance of one or more indexes that represent broad exposure to equity securities of issuers located in developed market countries outside of the U.S. (Developed Foreign Market Equity Index); and (iii) up to 20% of its assets in a portfolio of securities designed to track, before fees and expenses, the performance of one or more indexes that represent broad exposure to equity securities of issuers located in emerging market countries (Emerging Market Equity Index). Although SIMC will actively determine the percentage of the Fund that will be allocated to each of the U.S. Equity, Developed Foreign Market Equity and Emerging Market Equity Indexes (each, an Index, and collectively, the Indexes), the assets allocated to each Index will be managed using a passive approach. SIMC may adjust the Fund's allocation of assets among the Indexes over time on the basis of its long-term capital market assumptions.


The Fund's investment performance will depend on SIMC's allocation decisions with respect to the Indexes, the Fund's tracking of the Indexes and the performance of the Indexes. The Fund's ability to track the performance of each Index will be affected by the size and timing of cash flows into and out of the Fund, changes in SIMC's allocation of assets among the Indexes, and the Fund's fees and expenses.


The Fund generally will attempt to invest in securities composing an Index in approximately the same proportions as they are represented in the Index. It may not be possible or practicable to purchase all of the securities composing an Index or to hold them in the same weightings as they are represented in the Index. In those cases, the Fund's sub-adviser (the Sub-Adviser) may employ a sampling or optimization technique to replicate the Index. In seeking to track the performance of each Index, the Fund may invest in the following securities, not all of which may be constituents of an Index: common stocks, preferred stocks, depositary receipts, rights, warrants, ETFs, real estate investment trusts (REITs), and futures contracts. The Fund may use ETFs or futures contracts in lieu of investing directly in the securities making up the Index to obtain exposure to the equity markets, including during high volume periods of activity in the Fund, and may invest in certain fixed income instruments, such as Treasury bills, to serve as margin or collateral for such futures positions.


The Sub-Adviser selects the Fund's securities under the general supervision of SIMC. The Sub-Adviser's passive investment strategy seeks to track an index return, and therefore differs from an "active" investment strategy where an investment manager buys and sells securities based on its own economic, financial, and market analysis. The market capitalization and composition of the Indexes are subject to change. SIMC or the Sub-Adviser may sell securities that are represented in an Index or purchase securities that are not represented in an Index, prior to or after their removal or addition to the Index.


When the Fund is not an active component of the Adviser Managed Strategy, SIMC will act as the sole manager to the Fund, and a sub-adviser will not be used.
Risk [Heading] rr_RiskHeading Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

Market Risk — The risk that the market value of a security may move up and down, sometimes rapidly and unpredictably. Market risk may affect a single issuer, an industry, a sector or the equity or bond market as a whole.


Adviser Managed Strategy Risk — The Fund is a component of a broader investment strategy employed by the Financial Adviser known as the Adviser Managed Strategy. Pursuant to the Adviser Managed Strategy, the Financial Adviser tactically shifts its clients' assets among the Fund, the Tactical Offensive Fixed Income Fund and a money market fund affiliated with the Fund. These asset shifts among the funds in the Adviser Managed Strategy (i.e., an exchange of shares of one fund for shares of another fund) will be a taxable event to an investor unless the investor is investing in the Fund through a tax-deferred arrangement. As part of the Adviser Managed Strategy, substantial portions or substantially all of the Fund's shares may be periodically sold and repurchased at the direction of the Financial Adviser. These large redemptions and repurchases will have significant effects on the management of the Fund and are expected to result in increased portfolio turnover (and related transaction costs), disruption of portfolio management strategies and the realization of significant taxable gains. Accordingly, if notified of an upcoming redemption request, the Fund may begin to liquidate substantial portions or substantially all of its assets prior to the submission of the redemption request in an effort to raise the necessary cash, and the Fund will not be invested pursuant to its investment strategy during such time. When the Fund is required to rapidly liquidate a substantial portion of its portfolio to satisfy a large redemption order placed as part of the Adviser Managed Strategy, the Fund may be forced to sell securities at below current market values or the Fund's selling activity may drive down the market value of securities being sold. The Fund may also be required to sell portfolio holdings at a time when the portfolio managers would otherwise not recommend doing so. For example, if the Fund were to experience a large redemption at a time of high market volatility or during a substantial market decline, the Fund would be forced to liquidate securities even though the portfolio managers may not otherwise choose to do so. When the Fund receives a large purchase order as a result of the Adviser Managed Strategy, the Fund may be required to rapidly purchase portfolio securities. This may cause the Fund to incur higher than normal transaction costs or may require the Fund to purchase portfolio securities at above current market values. Further, the Fund's purchasing activity may drive up the market value of securities being purchased or the Fund may be required to purchase portfolio securities at a time when the portfolio managers would not otherwise recommend doing so. When the Fund is not an active component of the Adviser Managed Strategy, the Fund may miss investment opportunities because the assets necessary to take advantage of such opportunities are tied up in other investments or have been allocated to another fund within the Adviser Managed Strategy.


Asset Allocation Risk — The risk that SIMC's decisions regarding allocation of the Fund's assets among Indexes will not anticipate market trends successfully.


Tracking Error Risk — The risk that the Fund's performance may vary substantially from the performance of the Indexes it tracks as a result of cash flows, Fund expenses, imperfect correlation between the Fund's investments and the Indexes' components and other factors.


Investment Style Risk — The risk that the Fund's investment approach may underperform other segments of the equity markets or the equity markets as a whole.


Small and Medium Capitalization Risk — The risk that small and medium capitalization companies in which the Fund may invest may be more vulnerable to adverse business or economic events than larger, more established companies. In particular, small and medium capitalization companies may have limited product lines, markets and financial resources and may depend upon a relatively small management group. Therefore, small capitalization and medium capitalization stocks may be more volatile than those of larger companies. Small capitalization and medium capitalization stocks may be traded over-the-counter or listed on an exchange.


Exchange Traded Funds (ETFs) Risk — The risks of owning shares of an ETF generally reflect the risks of owning the underlying securities the ETF is designed to track, although lack of liquidity in an ETF could result in its value being more volatile than the underlying portfolio securities.


Real Estate Investment Trust (REITs) Risk — REITs are trusts that invest primarily in commercial real estate or real estate-related loans. The Fund's investments in REITs will be subject to the risks associated with the direct ownership of real estate. Risks commonly associated with the direct ownership of real estate include fluctuations in the value of underlying properties, defaults by borrowers or tenants, changes in interest rates and risks related to general or local economic conditions. Some REITs may have limited diversification and may be subject to risks inherent in financing a limited number of properties.


Foreign Investment/Emerging Markets Risk — The risk that non-U.S. securities may be subject to additional risks due to, among other things, political, social and economic developments abroad, currency movements and different legal, regulatory and tax environments. These additional risks may be heightened with respect to emerging market countries because political turmoil and rapid changes in economic conditions are more likely to occur in these countries.


Currency Risk — As a result of the Fund's investments in securities denominated in and/or receiving revenues in foreign currencies, the Fund will be subject to currency risk. This is the risk that those currencies will decline in value relative to the U.S. dollar or, in the case of hedging positions, that the U.S. dollar will decline in value relative to the currency hedged. In either event, the dollar value of an investment in the Fund would be adversely affected.


Derivatives Risk — The Fund's use of futures contracts is subject to market risk, leverage risk, correlation risk and liquidity risk. Leverage risk and liquidity risk are described below. Market risk is the risk that the market value of an investment may move up and down, sometimes rapidly and unpredictably. Correlation risk is the risk that changes in the value of the derivative may not correlate perfectly with the underlying asset, rate or index. Each of these risks could cause the Fund to lose more than the principal amount invested in a derivative instrument. The Fund's use of derivatives may also increase the amount of taxes payable by shareholders. Both U.S. and non-U.S. regulators are in the process of adopting and implementing regulations governing derivatives markets, the ultimate impact of which remains unclear.


Portfolio Turnover Risk — Due to its investment strategy, the Fund may buy and sell securities frequently. This may result in higher transaction costs and additional capital gains tax liabilities, which may affect the Fund's performance.


Leverage Risk — The use of leverage can amplify the effects of market volatility on the Fund's share price and may also cause the Fund to liquidate portfolio positions when it would not be advantageous to do so in order to satisfy its obligations.


Liquidity Risk — The risk that certain securities may be difficult or impossible to sell at the time and the price that the Fund would like. The Fund may have to lower the price of the security, sell other securities instead or forego an investment opportunity, any of which could have a negative effect on Fund management or performance.


Credit Risk — The risk that the issuer of a security or the counterparty to a contract will default or otherwise become unable to honor a financial obligation.


Investing in the Fund involves risk, and there is no guarantee that the Fund will achieve its investment goal. You could lose money on your investment in the Fund, just as you could with other investments. 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.
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money on your investment in the Fund, just as you could with other investments.
RIsk Not Insured [Text] rr_RiskNotInsured 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 bar chart and the performance table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for the past seven calendar years and by showing how the Fund's average annual returns for 1 and 5 years, and since the Fund's inception, compare with those of broad measures of market performance. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. For current performance information, please call 1-800-DIAL-SEI.


Because of the Fund's unique manner of operation in following the Adviser Managed Strategy, the Fund's performance may not be comparable to the performance of other mutual funds that invest in similar securities. Prior to October 1, 2014, the Fund's investment approach was an "active" investment strategy where an investment manager would buy and sell securities based on its own economic, financial, and market analysis. On October 1, 2014, SIMC implemented a "passive" investment strategy which seeks to track an index return.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and the performance table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for the past seven calendar years and by showing how the Fund's average annual returns for 1 and 5 years, and since the Fund's inception, compare with those of broad measures of market performance.
Performance Additional Market Index [Text] rr_PerformanceAdditionalMarketIndex This table compares the Fund's average annual total returns to those of a broad-based index and the Fund's 60/20/10/10 Blended Benchmark. The 60/20/10/10 Blended Benchmark consists of the Russell 1000 Index (60%), MSCI EAFE Index (20%), Russell 2000 Index (10%) and MSCI Emerging Markets Index (10%). The Fund's Blended Benchmark is designed to provide a useful comparison to the Fund's overall performance and more accurately reflects the Fund's investment strategy than the broad-based index.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1-800-DIAL-SEI
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Bar Chart Footnotes [Text Block] rr_BarChartFootnotesTextBlock

* The Fund was not an active component in the Adviser Managed Strategy for the period of August 6, 2011 through January 25, 2012; August 28, 2015 to April 14, 2016; and December 18, 2018 to March 24, 2019.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Best Quarter: 12.66% (3/31/12)
Worst Quarter: -13.18% (12/31/18)
The Fund's total return (pre-tax) from January 1, 2019 to September 30, 2019 was 16.85%.
Year to Date Return, Label rr_YearToDateReturnLabel The Fund's total return (pre-tax)
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2019
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 16.85%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2012
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 12.66%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (13.18%)
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (for the periods ended December 31, 2018)
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns will depend on your 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.
Performance Table Explanation after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher In the event of negative performance, the Fund's returns after taxes on distributions and sale of Fund shares are calculated assuming that an investor has sufficient capital gains of the same character from other investments to offset any capital losses from the sale of Fund shares. As a result, the Fund's returns after taxes on distributions and sale of Fund shares may exceed the Fund's returns before taxes and/or returns after taxes on distributions.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock

This table compares the Fund's average annual total returns to those of a broad-based index and the Fund's 60/20/10/10 Blended Benchmark. The 60/20/10/10 Blended Benchmark consists of the Russell 1000 Index (60%), MSCI EAFE Index (20%), Russell 2000 Index (10%) and MSCI Emerging Markets Index (10%). The Fund's Blended Benchmark is designed to provide a useful comparison to the Fund's overall performance and more accurately reflects the Fund's investment strategy than the broad-based index.


After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns will depend on your 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. In the event of negative performance, the Fund's returns after taxes on distributions and sale of Fund shares are calculated assuming that an investor has sufficient capital gains of the same character from other investments to offset any capital losses from the sale of Fund shares. As a result, the Fund's returns after taxes on distributions and sale of Fund shares may exceed the Fund's returns before taxes and/or returns after taxes on distributions.
Tactical Offensive Equity Fund | S&P 500 Index Return (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel S&P 500 Index Return (reflects no deduction for fees, expenses or taxes)
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (4.38%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 8.49%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 10.81%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Feb. 25, 2011
Tactical Offensive Equity Fund | The Fund's 60/20/10/10 Blended Benchmark Return (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel The Fund's 60/20/10/10 Blended Benchmark Return (reflects no deduction for fees, expenses or taxes)
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (8.14%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 5.73%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 7.91%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Feb. 25, 2011
Tactical Offensive Equity Fund | Tactical Offensive Equity Fund  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.20% [1]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none [1]
Other Expenses rr_OtherExpensesOverAssets 0.49% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.69% [1]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 70
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 221
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 384
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 859
Annual Return 2012 rr_AnnualReturn2012 16.83%
Annual Return 2013 rr_AnnualReturn2013 25.88%
Annual Return 2014 rr_AnnualReturn2014 4.56%
Annual Return 2015 rr_AnnualReturn2015 (3.84%)
Annual Return 2016 rr_AnnualReturn2016 10.93%
Annual Return 2017 rr_AnnualReturn2017 22.49%
Annual Return 2018 rr_AnnualReturn2018 (8.03%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (8.03%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 4.67%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 8.29%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Feb. 25, 2011
Tactical Offensive Equity Fund | Tactical Offensive Equity Fund | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (11.02%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 3.16%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 7.16%
Tactical Offensive Equity Fund | Tactical Offensive Equity Fund | After Taxes on Distributions and Sale of Fund Shares  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (2.64%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 3.45%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 6.54%
[1] The Fund is an integral part of the Financial Adviser's Adviser Managed Strategy, as discussed further below. As a result, shareholders in the Fund may also pay a fee to the Financial Adviser for participating in the Adviser Managed Strategy, and such fee is not reflected in this fee table or the Example numbers below. You should consult with the Financial Adviser regarding the fees charged for participating in the Adviser Managed Strategy.