XML 20 R8.htm IDEA: XBRL DOCUMENT v2.4.0.6
Label Element Value
Risk Return [Abstract] rr_RiskReturnAbstract  
ProspectusDate rr_ProspectusDate Jan. 31, 2012
SIT INTERNATIONAL EQUITY FUND (First Prospectus Summary) | SIT INTERNATIONAL EQUITY FUND
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Risk/Return, Heading rr_RiskReturnHeading INTERNATIONAL EQUITY FUND
Investment Objective, Heading rr_ObjectiveHeading Investment Goal
investment Objective, Primary rr_ObjectivePrimaryTextBlock 
Long-term capital appreciation.
Expense, Heading rr_ExpenseHeading Fees and Expenses
Expense, Narrative rr_ExpenseNarrativeTextBlock 
The following tables describe the fees and expenses that you may pay if you buy
and hold Fund shares.
Shareholder Fees, Caption rr_ShareholderFeesCaption SHAREHOLDER FEES (fees paid directly from your investment)
Operating Expenses, Caption rr_OperatingExpensesCaption ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover, Heading rr_PortfolioTurnoverHeading PORTFOLIO TURNOVER
Portfolio Turnover rr_PortfolioTurnoverTextBlock 
The Fund pays transaction costs, such as commissions, when it buys and sells
securities (or "turns over" its portfolio). A higher portfolio turnover rate may
indicate higher transaction costs and may result in higher taxes when Fund
shares are held in a taxable account. These costs, which are not reflected in
annual Fund operating expenses or in the Example, affect the Fund's performance.
During the most recent fiscal year, the Fund's portfolio turnover rate was 98%
of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 98.00%
Expense Example, Heading rr_ExpenseExampleHeading EXAMPLE
Expense Example, Narrative rr_ExpenseExampleNarrativeTextBlock 
This Example is intended to help you compare the cost of investing in the Fund
with the cost of investing in other mutual funds. The Example assumes that you
invest $10,000 in the Fund for the time periods indicated and then redeem all of
your shares at the end of those periods. The Example also assumes that your
investment has a 5% return each year and that the Fund's operating expenses
remain the same.
Expense Example, By Year, Caption rr_ExpenseExampleByYearCaption Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Investment Strategy, Heading rr_StrategyHeading Principal Investment Strategies
Investment Strategy, Narrative rr_StrategyNarrativeTextBlock 
Under normal circumstances, the International Equity Fund will invest at least
80% of its net assets (plus the amount of any borrowings for investment
purposes) in equity securities. Equity securities may include common stocks,
preferred stock and warrants. The Fund will invest primarily in equity
securities of issuers of all capitalization ranges that are located in at least
three countries other than the U.S. It is expected that at least 40% of the
Fund's assets will be invested outside the U.S. The Fund will invest primarily
in companies located in developed countries, but may also invest in companies
located in emerging markets. Generally, the Fund will invest less than 20% of
its assets in emerging markets. The Fund uses a multi-manager approach, relying
upon a number of sub-advisers (each, a Sub-Adviser and collectively, the
Sub-Advisers) with differing investment philosophies to manage portions of the
Fund's portfolio under the general supervision of SEI Investments Management
Corporation, the Fund's adviser (SIMC).

The Fund may invest in futures contracts and forward contracts for hedging
purposes, including to seek to manage the Fund's currency exposure to foreign
securities and mitigate the Fund's overall risk.

The Fund may purchase shares of exchange-traded funds (ETFs) to gain exposure to
a particular portion of the market while awaiting an opportunity to purchase
shares directly.
Risk, Heading rr_RiskHeading Principal Risks
Risk, Narrative rr_RiskNarrativeTextBlock 
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.

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. Currency risk 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 and forward 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.
The Fund's use of over-the-counter forward contracts is also subject to credit
risk and valuation risk. Valuation risk is the risk that the derivative may be
difficult to value and/or valued incorrectly. Credit risk is described above.
Each of the above risks could cause the Fund to lose more than the principal
amount invested in a derivative instrument.

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

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.

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 Style Risk -- The risk that developed international equity securities
may underperform other segments of the equity markets or the equity markets as a
whole.

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, sell other securities instead or forego an investment
opportunity, any of which could have a negative effect on Fund management or
performance.

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.

Small and Medium Capitalization Risk -- The small and medium capitalization
companies in which the Fund invests 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.

Loss of money is a risk of investing in the Fund.
Risk, Lose Money 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 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 ten calendar years and by showing how the Fund's
average annual returns for 1, 5 and 10 years, and since the Fund's inception,
compared with those of a broad measure 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.
Performance, Information Illustrates Variability of Returns 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 ten calendar years and by showing how the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception, compared with those of a broad measure of market performance.
Performance, Availability Phone Number rr_PerformanceAvailabilityPhone 1-800-DIAL-SEI
Performance, Past Does Not Indicate Future 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 rr_BarChartClosingTextBlock 
Best Quarter:   22.98% (06/30/09)

Worst Quarter: -26.13% (09/30/08)
Performance Table, Heading rr_PerformanceTableHeading Average Annual Total Returns (for the periods ended December 31, 2011)
Index No Deduction for Fees, Expenses, Taxes 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 
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.
SIT INTERNATIONAL EQUITY FUND (First Prospectus Summary) | SIT INTERNATIONAL EQUITY FUND | MSCI EAFE Index Return
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Average Annual Returns, Label rr_AverageAnnualReturnLabel MSCI EAFE Index Return (reflects no deduction for fees, expenses or taxes)
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (12.14%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 (4.72%)
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 4.67%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 3.42%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 1989 [1]
SIT INTERNATIONAL EQUITY FUND (First Prospectus Summary) | SIT INTERNATIONAL EQUITY FUND | CLASS A
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Redemption Fee (applies to a redemption, or series of redemptions, from a single identifiable source that, in the aggregate, exceeds $50 million within any thirty (30) day period) rr_RedemptionFeeOverRedemption (0.75%)
Management Fees rr_ManagementFeesOverAssets 0.51%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.76%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.27%
Expense Example, With Redemption, 1 Year rr_ExpenseExampleYear01 129
Expense Example, With Redemption, 3 Years rr_ExpenseExampleYear03 403
Expense Example, With Redemption, 5 Years rr_ExpenseExampleYear05 697
Expense Example, With Redemption, 10 Years rr_ExpenseExampleYear10 1,534
Annual Return 2002 rr_AnnualReturn2002 (16.98%)
Annual Return 2003 rr_AnnualReturn2003 31.88%
Annual Return 2004 rr_AnnualReturn2004 18.63%
Annual Return 2005 rr_AnnualReturn2005 14.28%
Annual Return 2006 rr_AnnualReturn2006 26.00%
Annual Return 2007 rr_AnnualReturn2007 6.96%
Annual Return 2008 rr_AnnualReturn2008 (50.39%)
Annual Return 2009 rr_AnnualReturn2009 24.00%
Annual Return 2010 rr_AnnualReturn2010 10.74%
Annual Return 2011 rr_AnnualReturn2011 (13.52%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 22.98%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (26.13%)
Average Annual Returns, Label rr_AverageAnnualReturnLabel Class A Shares Return Before Taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (13.52%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 (8.82%)
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 1.66%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 2.50%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 1989
SIT INTERNATIONAL EQUITY FUND (First Prospectus Summary) | SIT INTERNATIONAL EQUITY FUND | CLASS A | After Taxes on Distributions
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Average Annual Returns, Label rr_AverageAnnualReturnLabel Class A Shares Return After Taxes on Distributions
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (13.64%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 (9.48%)
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 1.07%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 1.60%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 1989
SIT INTERNATIONAL EQUITY FUND (First Prospectus Summary) | SIT INTERNATIONAL EQUITY FUND | CLASS A | After Taxes on Distributions and Sales
  
Risk Return [Abstract] rr_RiskReturnAbstract  
Average Annual Returns, Label rr_AverageAnnualReturnLabel Class A Shares Return After Taxes on Distributions and Sale of Fund Shares
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (8.27%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 (7.20%)
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 1.49%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 1.87%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 1989
[1] Index returns are shown from December 31, 1989.