XML 14 R5.htm IDEA: XBRL DOCUMENT v3.4.0.3
Label Element Value
Class A Prospectus | SIMT Multi-Strategy Alternative Fund  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] ck0000804239_SupplementTextBlock

SEI INSTITUTIONAL MANAGED TRUST


Multi-Strategy Alternative Fund
(the "Fund")


Supplement Dated May 3, 2016
to the Class A Shares Prospectus (the "Prospectus") dated January 31, 2016,
as amended on March 9, 2016 and April 15, 2016


This Supplement provides new and additional information beyond that contained in the Prospectus and should be read in conjunction with such Prospectus.


The Prospectus is hereby amended and supplemented to reflect the following changes to the Fund.
Risk/Return [Heading] rr_RiskReturnHeading SIMT Multi-Strategy Alternative Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

Restatement of the Fees and Expenses for the Fund


Under the section titled "Fund Summary," under the heading titled "Fees and Expenses," under the sub-heading titled "Annual Fund Operating Expenses," the table is hereby deleted and replaced with the following in order to reflect the Fund's current fees and expenses:
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)
Acquired Fund Fees and Expenses, Based on Estimates [Text] rr_AcquiredFundFeesAndExpensesBasedOnEstimates AFFE is based on estimated amounts for the current fiscal year.
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent Total Annual Fund Operating Expenses have been restated to reflect current fees.
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees The Fund incurred AFFE during the most recent fiscal year, and therefore 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 other investment companies.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

In addition, under the same heading, under the sub-heading titled "Example," the table is hereby deleted and replaced with the following:
Expense Example Closing [Text Block] rr_ExpenseExampleClosingTextBlock

PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE
Class A Prospectus | SIMT Multi-Strategy Alternative Fund | Class A  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 1.50% [1]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none [1]
Dividends on Shorts rr_Component1OtherExpensesOverAssets 0.02% [1]
Remainder of Other Expenses rr_Component3OtherExpensesOverAssets 0.61% [1]
Total Other Expenses rr_OtherExpensesOverAssets 0.63% [1]
Acquired Funds Fees and Expenses (AFFE) rr_AcquiredFundFeesAndExpensesOverAssets 0.82% [1],[2]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.95% [1]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 298
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 913
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,552
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 3,271
[1] Total Annual Fund Operating Expenses have been restated to reflect current fees.
[2] AFFE is based on estimated amounts for the current fiscal year. The Fund incurred AFFE during the most recent fiscal year, and therefore 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 other investment companies.