XML 182 R402.htm IDEA: XBRL DOCUMENT v2.4.0.6
Label Element Value
Risk Return [Abstract] rr_RiskReturnAbstract  
ProspectusDate rr_ProspectusDate Jan. 31, 2012
SIMT MULTI-ASSET ACCUMULATION FUND (Prospectus Summary) | SIMT MULTI-ASSET ACCUMULATION FUND
 
Risk Return [Abstract] rr_RiskReturnAbstract  
Risk/Return, Heading rr_RiskReturnHeading MULTI-ASSET ACCUMULATION FUND
Investment Objective, Heading rr_ObjectiveHeading Investment Goal
investment Objective, Primary rr_ObjectivePrimaryTextBlock Total return, including capital appreciation and income.
Expense, Heading rr_ExpenseHeading Fees and Expenses
Expense, Narrative rr_ExpenseNarrativeTextBlock This table describes 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 will pay 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.
Other Expenses, New Fund, Based on Estimates rr_OtherExpensesNewFundBasedOnEstimates Other expenses are based on estimated amounts for the current fiscal year.
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 Fund will seek to generate total return over
time by selecting investments from among a broad range of asset classes based
upon SEI Investment Management Corporation's (SIMC) or the sub-adviser's (each,
a Sub-Adviser and collectively, the Sub-Advisers) expectations of risk and
return. The asset classes used and the Fund's allocations among asset classes
will be determined based on SIMC's or the Sub-Adviser's views of fundamental,
technical or valuation measures. The Fund's allocations among asset classes may
be adjusted over short periods of time. At any point in time, the Fund may be
diversified across many asset classes or concentrated in a limited number of
asset classes.

The Fund uses a multi-manager approach under the general supervision of SIMC,
allocating its assets among one or more Sub-Advisers using different investment
strategies. SIMC may also directly manage a portion of the Fund's portfolio.

The Fund may allocate all or a portion of its assets using a "risk parity"
approach that seeks to balance risk across all capital market exposures, which
may result in asset classes with lower perceived risk having a greater notional
allocation within the Fund's portfolio than asset classes with higher perceived
risk. Notional allocation refers to the Fund's use of one or more derivative
contracts to attempt to obtain exposure to a potential gain or loss on the
market value of the instruments underlying the Fund's derivative contracts
(e.g., a security, currency or commodity (or a basket or index)). The market
value of such underlying instruments generally exceeds the amount of cash or
assets required to establish or maintain the derivative contracts. In addition,
the Fund may further adjust asset allocations and capital market exposures based
on realized and expected measures of volatility with the goal of managing the
Fund's volatility. This may result in the Fund increasing capital market
exposures during periods of perceived falling risk and decreasing capital market
exposures during periods of perceived rising risk. The Fund may obtain its
exposures to the asset classes by investing directly in securities and other
investments or indirectly through the use of other pooled investment vehicles
and derivative instruments, principally futures, forwards, options and swaps.

The Fund may invest in equity securities, including common stocks, preferred
stocks, convertible securities, warrants and depositary receipts of U.S. and
non-U.S. issuers (including emerging markets) of various market capitalizations
and industries.

The Fund may invest in fixed income securities that are investment or
non-investment grade (also known as junk bonds), U.S.- or foreign-issued
(including emerging markets) and corporate- or government-issued. The Fund's
fixed income investments may include asset-backed securities, mortgage-backed
securities, corporate bonds and debentures, commercial paper, exchange traded
notes (ETNs), money market instruments, mortgage dollar rolls, repurchase and
reverse repurchase agreements, when issued/delayed delivery securities, zero
coupon bonds, obligations of foreign governments and obligations of either
supranational entities issued or guaranteed by certain banks and entities
organized to restructure the outstanding debt of such issuers. The Fund's
fixed income investments may also include U.S. Treasury obligations,
obligations issued by agencies or instrumentalities of the U.S. Government (including obligations not guaranteed by the U.S. Treasury), such as
obligations issued by U.S. Government sponsored entities, and Treasury
Inflation Protected Securities (TIPS) and other inflation-linked debt
securities of both U.S. and non-U.S. governments and corporations. The Fund
may invest in fixed, variable and floating rate fixed income instruments.
The Fund's portfolio and the Fund's investments in particular fixed income securities are not subject to any maturity or duration restrictions.

The Fund may also invest a portion of its assets in bank loans, which are,
generally, non-investment grade floating rate instruments, in the form of
participations in the loans (participations) and assignments of all or a portion
of the loans from third parties (assignments).

In addition to direct investment in securities and other instruments, the Fund
may invest in affiliated and unaffiliated funds, including open-end funds, money
market funds, closed-end funds and exchange-traded funds (ETFs) to obtain the
Fund's desired exposure to an asset class. The Fund may also invest in real
estate investment trusts (REITs) and securities issued by U.S. and non-U.S. real
estate companies.

A portion of the Fund's assets may also be invested in commodity investments to
provide exposure to the investment returns of the commodities markets. Commodity
investments include notes with interest payments that are tied to an underlying
commodity or commodity index, ETFs or other exchange-traded products that are
tied to the performance of a commodity or commodity index or other types of
investment vehicles or instruments that provide returns that are tied to
commodities or commodity indices. The Fund may also invest in equity securities
of issuers in commodity-related industries.

The Fund may also seek to gain exposure to the commodity markets, in whole or in
part, through investments in a wholly owned subsidiary of the Fund organized
under the laws of the Cayman Islands (Subsidiary). The Subsidiary, unlike the
Fund, may invest to a significant extent in commodities, commodity contracts,
commodity investments and derivative instruments. The Subsidiary may also invest
in other instruments in which the Fund is permitted to invest, either as
investments or to serve as margin or collateral for its derivative positions.
The Fund may invest up to 25% of its total assets in the Subsidiary. The
Subsidiary is advised by SIMC.

The Fund may also purchase or sell futures contracts, options, forward contracts
and swaps for return enhancement, hedging purposes or to obtain the Fund's
desired exposure to an asset class. Futures contracts, forward contracts,
options and swaps may be used to synthetically obtain exposure to securities or
baskets of securities and to manage the Fund's interest rate duration and yield
curve exposure. These derivatives may also be used to mitigate the Fund's
overall level of risk and/or the Fund's risk to particular types of securities
or market segments. The Fund may purchase or sell futures contracts on U.S.
Government securities for return enhancement and hedging purposes. Interest rate
swaps are further used to manage the Fund's yield spread sensitivity. Securities
index swaps may be used to manage the inflation-adjusted return of the Fund. The
Fund may buy credit default swaps in an attempt to manage credit risk where the
Fund has credit exposure to an issuer, and the Fund may sell credit default
swaps to more efficiently gain credit exposure to a security or basket of
securities.

The Fund may invest in U.S. dollar and non-U.S. dollar denominated securities.
The Sub-Adviser may also seek to enhance the Fund's return by actively managing
the Fund's foreign currency exposure. In managing the Fund's currency exposure,
the Sub-Adviser may buy and sell currencies (i.e., take long or short
positions) using futures and foreign currency forward contracts. The Fund
may take long and short positions in foreign currencies in excess of the value
of the Fund's assets denominated in a particular currency or when the Fund does
not own assets denominated in that currency. The Fund may also engage in
currency transactions in an attempt to take advantage of certain inefficiencies
in the currency exchange market, to increase its exposure to a foreign currency
or to shift exposure to foreign currency fluctuations from one currency to
another. In managing the Fund's currency exposure for foreign securities, the
Sub-Adviser may buy and sell currencies for hedging or for speculative purposes.

Due to its investment strategy, the Fund may buy and sell securities frequently.
Risk, Heading rr_RiskHeading Principal Risks
Risk, Narrative rr_RiskNarrativeTextBlock The success of the Fund's investment strategy depends both on SIMC's selection
of the Sub-Adviser(s) and allocation of assets to such Sub-Adviser(s). The
Sub-Adviser(s) may be incorrect in assessing market trends or the value or
growth capability of particular securities or asset classes. In addition, the
methodology by which SIMC allocates the Fund's assets to the Sub-Adviser(s) may
not achieve desired results and may cause the Fund to lose money or underperform
other comparable mutual funds.

The Sub-Adviser(s) and any underlying funds in which it 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 achieve those investment
strategies. The principal risks of using such investment strategies and making
investments in such asset classes, securities and other investments are set
forth below. Because an underlying fund's use of an investment strategy or
investment in an asset class, security or other investment is subject to the
same or similar risks as the Fund's use of such strategy or investment in such
asset class, security or other investment, the term "the Fund" in the paragraphs
below collectively refers to both the Fund and each underlying fund.

American Depositary Receipts (ADRs) Risk - ADRs are certificates evidencing
ownership of shares of a foreign issuer that are issued by depositary banks and
generally trade on an established market. ADRs are subject to many of the risks
associated with investing directly in foreign securities, including, among other
things, political, social and economic developments abroad, currency movements
and different legal, regulatory and tax environments.

Asset-Backed Securities Risk - Payment of principal and interest on asset-backed
securities is dependent largely on cash flows generated by the assets backing
the securities, and asset-backed securities may not have the benefit of any
security interest in the related assets.

Bank Loans Risk - With respect to bank loans, the Fund will assume the credit
risk of both the borrower and the lender that is selling the participation in
the loan. The Fund may also have difficulty disposing of bank loans because, in
certain cases, the market for such instruments is not highly liquid.

Below Investment Grade Securities Risk - Fixed income securities rated below
investment grade (junk bonds) involve greater risks 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 and Derivatives Risk - 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.

Corporate Fixed Income Securities Risk - Corporate fixed income securities
respond to economic developments, especially changes in interest rates, as well
as to perceptions of the creditworthiness and business prospects of individual
issuers.

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 - Due to its active positions in currencies, the Fund 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 United States or abroad.

Derivatives Risk - The Fund's use of futures contracts, forward contracts,
options and swaps is subject to market risk, leverage risk, correlation risk and
liquidity risk. Leverage risk, liquidity risk and market risk are described
below. 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 forward contracts and swap agreements is also subject to credit risk and
valuation risk. Valuation risk is the risk that the derivative may be difficult
to value and/or may be valued incorrectly. Credit risk is described above. Each
of these risks could cause the Fund to lose more than the principal amount
invested in a derivative instrument.

Duration Risk - The longer-term securities in which the Fund may invest tend to
be more volatile than shorter-term securities. A portfolio with a longer average
portfolio duration is more sensitive to changes in interest rates than a
portfolio with a shorter average portfolio duration.

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

Exchange-Traded Notes (ETNs) Risk - The value of an ETN is subject to the credit
risk of the issuer. There may not be an active trading market available for some
ETNs. Additionally, trading of ETNs may be halted or delisted by the listing
exchange.

Extension Risk - The risk that rising interest rates may extend the duration of
a fixed income security, typically reducing the security's value.

Fixed Income Market Risk - The prices of the Fund's 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.

Foreign Sovereign Debt Securities Risk - The risks that: (i) the governmental
entity that controls the repayment of sovereign debt may not be willing or able
to repay the principal and/or interest when it becomes due, due to factors such
as debt service burden, political constraints, cash flow problems and other
national economic factors; (ii) governments may default on their debt
securities, which may require holders of such securities to participate in debt
rescheduling or additional lending to defaulting governments; and (iii) there is
no bankruptcy proceeding by which defaulted sovereign debt may be collected in
whole or in part.

Income Risk - The possibility that the Fund's yield will decline due to falling
interest rates.

Inflation Protected Securities Risk - The value of inflation protected
securities, including TIPS, will typically fluctuate in response to changes in
"real" interest rates, generally decreasing when real interest rates rise and
increasing when real interest rates fall. Real interest rates represent nominal
(or stated) interest rates reduced by the expected impact of inflation. In
addition, interest payments on inflation-indexed securities will generally vary
up or down along with the rate of inflation.

Interest Rate Risk - The risk that the Fund's yield will decline due to falling
interest rates. An increase in interest rates typically causes the value of
fixed income securities in which the Fund invests to fall, while a decrease in
interest rates typically causes the value of such securities to rise.

Investment Company Risk - When the Fund invests in an investment company,
including closed-end funds and ETFs, 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. Further, 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 had invested directly in the underlying
investments. For example, the lack of liquidity in an ETF could result in its
value being more volatile than that of the underlying portfolio securities.
Closed-end investment companies issue a fixed number of shares that trade on a
stock exchange or over-the-counter at a premium or a discount to their net asset
value. As a result, a closed-end fund's share price fluctuates based on what
another investor is willing to pay rather than on the market value of the
securities in the fund.

Investment in the Subsidiary Risk - The Subsidiary is not registered under the
Investment Company Act of 1940 (the 1940 Act) and, unless otherwise noted in
this prospectus, is not subject to all of the investor protections of the 1940
Act. Thus, the Fund, as an investor in the Subsidiary, will not have all of the
protections offered to investors in registered investment companies. In
addition, changes in the laws of the United States and/or the Cayman Islands,
under which the Fund and the Subsidiary, respectively, are organized, could
result in the inability of the Fund and/or the Subsidiary to operate as intended
and could negatively affect the Fund and its shareholders.

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 otherwise 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 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.

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.

Mortgage-Backed Securities Risk - Mortgage-backed securities are affected by,
among other things, interest rate changes and the possibility of prepayment of
the underlying mortgage loans. Mortgage backed securities are also subject to
the risk that underlying borrowers will be unable to meet their obligations.

Non-Diversified Risk - The Fund is non-diversified, which means that it may
invest in the securities of relatively few issuers. As a result, the Fund may be
more susceptible to a single adverse economic or political occurrence affecting
one or more of these issuers and may experience increased volatility due to its
investments in those securities.

Opportunity Risk - The risk of missing out on an investment opportunity because
the assets necessary to take advantage of it are tied up in other investments.

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.

Prepayment Risk - The risk that, with declining interest rates, fixed income
securities with stated interest rates may have the principal paid earlier than
expected, requiring the Fund to invest the proceeds at generally lower interest
rates.

Private Placements Risk - Investment in privately placed securities may be less
liquid than in publicly traded securities. Although these securities may be
resold in privately negotiated transactions, the prices realized from these
sales could be less than those originally paid by the Fund or less than what may
be considered the fair value of such securities. Further, companies whose
securities are not publicly traded may not be subject to the disclosure and
other investor protection requirements that might be applicable if their
securities were publicly traded.

Real Estate Industry Risk - Securities of companies principally engaged in the
real estate industry may be subject to the risks associated with direct
ownership of real estate. Risks commonly associated with the direst 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.

REITs Risk - REITs are trusts that invest primarily in commercial real estate or
real estate-related loans. The Fund's investments in REITs are subject to the
risks associated with the direct ownership of real estate, which are discussed
above. Some REITs may have limited diversification and may be subject to risks
inherent in financing a limited number of properties.

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.

Tax Risk - The Fund may gain most of its exposure to the commodities markets
through its investment in the Subsidiary, which invests in commodity investments
and derivative instruments. To the extent the Fund invests in such instruments
directly, it will seek to restrict its income from commodity-linked derivative
instruments that do not generate qualifying income, such as commodity-linked
swaps, to a maximum of 10% of its gross income (when combined with its other
investments that produce non-qualifying income) to comply with certain
qualifying income tests necessary for the Fund to qualify as a regulated
investment company under Subchapter M of the Internal Revenue Code of 1986, as
amended. The tax treatment of certain commodity-linked derivative instruments
may be affected by future regulatory or legislative changes that could affect
the character, timing and/or amount of the Fund's taxable income or gains and
distributions.

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 rr_RiskLoseMoney Loss of money is a risk of investing in the Fund.
Risk, Nondiversified Status rr_RiskNondiversifiedStatus The Fund is non-diversified, which means that it may invest in the securities of relatively few issuers. As a result, the Fund may be more susceptible to a single adverse economic or political occurrence affecting one or more of these issuers and may experience increased volatility due to its investments in those securities.
Bar Chart and Performance Table, Heading rr_BarChartAndPerformanceTableHeading Performance Information
Performance, Narrative rr_PerformanceNarrativeTextBlock As of January 31, 2012, the Fund had not yet commenced operations; therefore,
performance results have not been provided.
Performance, One Year or Less rr_PerformanceOneYearOrLess As of January 31, 2012, the Fund had not yet commenced operations; therefore, performance results have not been provided.
SIMT MULTI-ASSET ACCUMULATION FUND (Prospectus Summary) | SIMT MULTI-ASSET ACCUMULATION 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 $25 million within any thirty (30) day period) rr_RedemptionFeeOverRedemption (0.75%)
Management Fees (of the Fund and Subsidiary) ck0000804239_Component1ManagementFeesOverAssets 0.0075
Management Fees of the Fund ck0000804239_Component2ManagementFeesOverAssets 0.00
Total Management Fees rr_ManagementFeesOverAssets 0.75%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses of the Fund rr_Component1OtherExpensesOverAssets 0.75% [1]
Other Expenses of the Subsidiary rr_Component2OtherExpensesOverAssets none [1]
Total Other Expenses rr_OtherExpensesOverAssets 0.75% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.50%
Expense Example, With Redemption, 1 Year rr_ExpenseExampleYear01 153
Expense Example, With Redemption, 3 Years rr_ExpenseExampleYear03 474
[1] Other expenses are based on estimated amounts for the current fiscal year.