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Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading SAAT CONSERVATIVE STRATEGY FUND
Objective [Heading] rr_ObjectiveHeading Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

Manage risk of loss while providing the opportunity for modest 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 62% of the average value of its portfolio.

Portfolio Turnover, Rate rr_PortfolioTurnoverRate 62.00%
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees Because the Fund incurred AFFE during the most recent fiscal year, the operating expenses in this fee table will not correlate to the expense ratio in the Fund's financial statements (or the "Financial Highlights" section in the prospectus) because the financial statements include only the direct operating expenses incurred by the Fund, not the indirect costs of investing in underlying funds.
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

Under normal circumstances, the Conservative Strategy Fund will seek to manage risk of loss while providing the opportunity for modest capital appreciation. Managing the risk of loss does not mean preventing losses, but rather managing the Fund in a manner intended to limit the level of losses that the Fund could incur over any particular period. The Fund predominantly invests in Underlying SEI Funds, each of which has its own investment goal. The Underlying SEI Funds invest, in turn, in securities and other instruments of various asset classes. Each of the Underlying SEI Funds is managed by one or more Sub-Advisers under the supervision of SIMC, or, in certain circumstances, is managed directly by SIMC.


The Fund's assets may be diversified across Underlying SEI bond and money market funds, equity funds, real estate funds and multi-asset funds. The bond funds may consist of a wide range of investment styles that provide exposure to U.S. and/or foreign fixed income securities of varying credit quality (including junk bonds), maturity and duration. The equity funds may consist of a wide range of investment styles that provide investment exposure to U.S. and/or foreign equity securities of companies of various capitalization ranges. The real estate funds provide exposure to the equity securities of real estate companies. The multi-asset funds consist of funds that seek to achieve their investment goals by selecting investments from among a broad range of asset classes. A multi-asset fund may also adjust its allocation among asset classes over short periods of time, and therefore it may provide the Fund with a dynamic investment component. Although a multi-asset fund could consist of equity securities, bonds or real estate securities, it may also provide exposure to additional asset classes, such as commodities.


The Fund's assets are allocated among a variety of Underlying SEI Funds within the following percentage ranges:


Underlying SEI Fund Type

  Investment Range
(Percentage of the Fund's Assets) 		 

Investment Grade Bond & Money Market Funds

   

25-100

%

 

U.S. Equity Funds

   

0-40

%

 

Non-Investment Grade Bond Funds

   

0-35

%

 

Real Estate Funds

   

0-25

%

 

International Equity Funds

   

0-20

%

 

Multi-Asset Investment Funds

   

0-60

%

 

The Fund may also directly invest in interests of exchange traded products (ETPs) (including exchange-traded funds structured as investment companies (ETFs), exchange-traded notes (ETNs) and exchange-traded commodity pools), shares of other investment companies, and derivative instruments, such as futures contracts, options, forward contracts and swaps. The Fund may invest in such instruments to implement an investment technique or achieve a specific asset class exposure that could not be efficiently implemented from an allocation to the Underlying SEI Funds alone. For instance, the Fund may invest in such securities to offset or pursue a sector overweight or underweight, to hedge or increase exposure to a specific currency, to gain exposure to additional asset classes, to adjust characteristics of the Fund, such as interest rate duration or yield curve exposure, or to otherwise enhance or offset exposures incurred by the Fund through its investments in the Underlying SEI Funds.

Risk [Heading] rr_RiskHeading Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

The success of the Fund's investment strategy depends on SIMC's allocation of assets among the Underlying SEI Funds and its selection of other investment companies, ETPs and derivative instruments in which to invest that portion of the Fund's assets not allocated to the Underlying SEI Funds. In managing the Fund, SIMC may be incorrect in assessing market trends or the value or growth capability of particular asset classes or other investments. In addition, the methodology by which SIMC allocates the Fund's assets among the Underlying SEI Funds and other investments may not achieve desired results and may cause the Fund to lose money or underperform other comparable mutual funds.


The Underlying SEI Funds and other investment companies and ETPs in which the Fund invests may apply any of a variety of investment strategies and may invest in a broad range of asset classes, securities and other investments to attempt to achieve their designated investment goals. The principal risks of the Fund as a result of its investments in the Underlying SEI Funds and other investment companies, ETPs or other investments are set forth below.


Asset Allocation Risk — The risk that SIMC's decisions regarding asset classes and Underlying SEI Funds will not anticipate market trends successfully.


Below Investment Grade Securities (Junk Bonds) Risk — Fixed income securities rated below investment grade (junk bonds) involve greater risk of default or downgrade and are more volatile than investment grade securities because the prospect for repayment of principal and interest of many of these securities is speculative.


Commodity Investments Risk — Certain Underlying SEI Funds may invest a portion of their assets in a wholly owned subsidiary that is not registered under the Investment Company Act of 1940 and invests directly in commodities and commodity-related instruments. Other Underlying SEI Funds may have indirect exposure to commodities by investing in commodity-related instruments. Commodity investments and derivatives may be more volatile and less liquid than direct investments in the underlying commodities themselves. Commodity-related equity returns can also be affected by the issuer's financial structure or the performance of unrelated businesses. The value of a commodity investment or a derivative investment in commodities is typically based upon the price movements of a physical commodity, a commodity futures contract or commodity index or some other readily measurable economic variable that is dependent upon changes in the value of commodities or the commodities markets. The value of these securities will rise or fall in response to changes in the underlying commodity or related benchmark or investment, changes in interest rates, or factors affecting a particular industry or commodity, such as natural disasters, weather and U.S. and international economic, political and regulatory developments.


Currency Risk — The Fund and certain Underlying SEI Funds will be subject to the risk that currency exchange rates may fluctuate in response to, among other things, changes in interest rates, intervention (or failure to intervene) by U.S. or foreign governments, central banks or supranational entities or by the imposition of currency controls or other political developments in the U.S. or abroad.


Derivatives Risk — The use of futures contracts, forward contracts, options and swaps is subject to market risk, leverage risk, correlation risk and liquidity risk. Market risk is the risk that the market value of an investment may move up and down, sometimes rapidly and unpredictably. Leverage risk is the risk that a small percentage of assets invested in a derivative can have a disproportionately larger impact on the Fund or an Underlying SEI Fund. Correlation risk is the risk that changes in the value of a derivative instrument may not correlate perfectly with changes in the value of the derivative instrument's underlying asset, rate or index. Liquidity risk is the risk that the derivative may be difficult or impossible to sell at the time and the price that the Fund or an Underlying SEI Fund would like, which may cause the Fund or the Underlying SEI Fund to have to lower the selling price, sell other securities instead or forego an investment opportunity, any of which could have a negative effect on the Fund's or the Underlying SEI Fund's management or performance. The use of swaps and over-the-counter forward contracts and options is also subject to credit risk and valuation risk. Credit risk is the risk that the issuer of a security or counterparty to a derivatives contract will default or otherwise become unable to honor its financial obligation to the Fund or the Underlying SEI Fund under the contract. Valuation risk is the risk that the derivative may be difficult to value and/or valued incorrectly. Each of the above risks could cause the Fund or an Underlying SEI Fund to lose more than the principal amount invested in a derivative instrument.


Equity Market Risk — The risk that prices of stocks will fall over short or extended periods of time.


Exchange-Traded Products (ETPs) Risk — The risks of owning interests of an ETP, such as an ETF, ETN or exchange-traded commodity pool, generally reflect the same risks as owning the underlying securities or other instruments that the ETP is designed to track. The shares of certain ETPs may trade at a premium or discount to their intrinsic value (i.e., the market value may differ from the net asset value of an ETP's shares). For example, supply and demand for shares of an ETF or market disruptions may cause the market price of the ETF to deviate from the value of the ETF's investments, which may be emphasized in less liquid markets. The value of an ETN may also differ from the valuation of its reference market or instrument due to changes in the issuer's credit rating. By investing in an ETP, the Fund or an Underlying SEI Fund indirectly bears the proportionate share of any fees and expenses of the ETP in addition to the fees and expenses that the Fund and its shareholders directly bear in connection with the Fund's operations. Because certain ETPs may have a significant portion of their assets exposed directly or indirectly to commodities or commodity-linked securities, developments affecting commodities may have a disproportionate impact on such ETPs and may subject the ETPs to greater volatility than investments in traditional securities.


Fixed Income Market Risk — The prices of fixed income securities respond to economic developments, particularly interest rate changes, as well as to perceptions about the creditworthiness of individual issuers, including governments and their agencies. In the case of foreign securities, price fluctuations will reflect international economic and political events, as well as changes in currency valuations relative to the U.S. dollar.


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 since political turmoil and rapid changes in economic conditions are more likely to occur in these countries.


Investment Company Risk — When the Fund or an Underlying SEI Fund invests in an investment company, in addition to directly bearing the expenses associated with its own operations, it will bear a pro rata portion of the investment company's expenses. In addition, while the risks of owning shares of an investment company generally reflect the risks of owning the underlying investments of the investment company, the Fund may be subject to additional or different risks than if the Fund or an Underlying SEI Fund had invested directly in the underlying investments.


Real Estate Industry Risk — Securities of companies principally engaged in the real estate industry may be subject to the risks associated with the direct ownership of real estate, including 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.


Short Sales Risk — A short sale involves the sale of a security that a fund does not own in the expectation of purchasing the same security (or a security exchangeable therefore) at a later date at a lower price. Short sales entered into by an Underlying SEI Fund expose the Fund to the risk that the Underlying SEI Fund will be required to buy a security sold short (also known as "covering" the short position) at a time when the security has appreciated in value, thus resulting in a loss to the Underlying SEI Fund and, therefore, the Fund. Reinvesting proceeds received from short selling may create leverage, which can amplify the effects of market volatility on the share price of an Underlying SEI Fund and, therefore, the Fund. Investment in short sales may also cause an Underlying SEI Fund to incur expenses related to borrowing securities.


Small and Medium Capitalization Risk — Small and medium capitalization companies 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 and medium capitalization stocks may be more volatile than those of larger companies. Small and medium capitalization stocks may be traded over-the-counter or listed on an exchange.


U.S. Government Securities Risk — Although U.S. Government securities are considered to be among the safest investments, they are not guaranteed against price movements due to changing interest rates. Obligations issued by some U.S. Government agencies are backed by the U.S. Treasury, while others are backed solely by the ability of the agency to borrow from the U.S. Treasury or by the agency's own resources.


Loss of money is a risk of investing in the Fund.

Risk Lose Money [Text] rr_RiskLoseMoney Loss of money is a risk of investing in the Fund.
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 nine calendar years and by showing how the Fund's average annual returns for 1 and 5 years, and since the Fund's inception, compared with those of a broad measure of market performance.


The Fund's Class D Shares commenced operations on March 25, 2011. Performance and average annual returns for the periods prior to March 25, 2011 are calculated using the performance and the average annual returns of the Fund's Class A Shares. Since Class D Shares are invested in the same portfolio of securities as Class A Shares, returns for Class D Shares would be substantially similar to those of Class A Shares and would differ only to the extent that Class D Shares have higher expenses. The Fund's Class A Shares commenced operations on November 17, 2003.


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.

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 nine calendar years and by showing how the Fund's average annual returns for 1 and 5 years, and since the Fund's inception, compared with those of a broad measure of market performance.
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 Closing [Text Block] rr_BarChartClosingTextBlock

Best Quarter: 6.35% (06/30/09)


Worst Quarter: -13.34% (12/31/08)


The Fund's Class D total return (pre-tax) from January 1, 2013 to June 30, 2013 was 0.79%.

Year to Date Return, Label rr_YearToDateReturnLabel Class D total return (pre-tax)
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Jun. 30, 2013
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 0.79%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 6.35%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (13.34%)
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (for the periods ended December 31, 2012)
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 Narrative rr_PerformanceTableNarrativeTextBlock

This table compares the Fund's average annual total returns for to those of a broad-based index and two additional indices: the S&P 500 Index and the BofA Merrill Lynch 3-Month U.S. Treasury Bill Index. The S&P 500 Index and the BofA Merrill Lynch 3-Month U.S. Treasury Bill Index, in conjunction with the broad-based index, are used to track the broad range of allocations the Fund makes to the Underlying SEI Funds, while each index individually only tracks one specific allocation of the Fund. The foregoing indices, when considered together, may provide investors with a useful comparison of the Fund's overall performance.


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.

Barclays Capital U.S. Aggregate Bond Index Return (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Barclays Capital U.S. Aggregate Bond Index Return (reflects no deduction for fees, expenses or taxes)
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 4.21%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 5.95%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 5.37% [1]
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Nov. 30, 2003
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 16.00%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 1.66%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 5.48% [1]
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Nov. 30, 2003
BofA Merrill Lynch 3-Month U.S. Treasury Bill Index Return (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel BofA Merrill Lynch 3-Month U.S. Treasury Bill Index Return (reflects no deduction for fees, expenses or taxes)
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 0.11%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 0.52%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 1.85% [1]
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Nov. 30, 2003
SAAT CONSERVATIVE STRATEGY FUND - CLASS D
  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.10%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses rr_OtherExpensesOverAssets 0.53%
Acquired Fund Fees and Expenses (AFFE) rr_AcquiredFundFeesAndExpensesOverAssets 0.69%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.07% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 210
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 649
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,114
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,400
Annual Return 2004 rr_AnnualReturn2004 8.35%
Annual Return 2005 rr_AnnualReturn2005 4.55%
Annual Return 2006 rr_AnnualReturn2006 10.75%
Annual Return 2007 rr_AnnualReturn2007 0.75%
Annual Return 2008 rr_AnnualReturn2008 (20.93%)
Annual Return 2009 rr_AnnualReturn2009 13.79%
Annual Return 2010 rr_AnnualReturn2010 6.57%
Annual Return 2011 rr_AnnualReturn2011 2.21%
Annual Return 2012 rr_AnnualReturn2012 5.34%
Label rr_AverageAnnualReturnLabel Return Before Taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 5.34%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 (0.11%)
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 2.19%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Nov. 17, 2003
SAAT CONSERVATIVE STRATEGY FUND - CLASS D | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 4.85%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 (0.96%)
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 1.09%
SAAT CONSERVATIVE STRATEGY FUND - CLASS D | 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 3.51%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 (0.60%)
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 1.24%
[1] Index returns are shown from November 30, 2003.
[2] Because the Fund incurred AFFE during the most recent fiscal year, the operating expenses in this fee table will not correlate to the expense ratio in the Fund's financial statements (or the "Financial Highlights" section in the prospectus) because the financial statements include only the direct operating expenses incurred by the Fund, not the indirect costs of investing in underlying funds.