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2018-09-26
2018-09-26
0000804239
ck0000804239:doc_Class_F_ProspectusMember
ck0000804239:S000028026Member
2018-09-26
2018-09-26
0000804239
ck0000804239:doc_Class_F_ProspectusMember
ck0000804239:S000028026Member
ck0000804239:C000085250Member
2018-09-26
2018-09-26
0000804239
ck0000804239:doc_Class_Y_ProspectusMember
ck0000804239:S000028026Member
2018-09-26
2018-09-26
0000804239
ck0000804239:doc_Class_Y_ProspectusMember
ck0000804239:S000028026Member
ck0000804239:C000147402Member
2018-09-26
2018-09-26
xbrli:pure
iso4217:USD
Other Expenses have been restated to reflect estimated fees and expenses for the remainder of the current fiscal year and the upcoming fiscal year.
The Fund is anticipated to incur AFFE during the current 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). The financial statements include only the direct operating expenses incurred by the Fund, not the indirect costs of investing in other investment companies.
SEI INSTITUTIONAL MANAGED TRUST
497
false
0000804239
2018-09-26
2018-09-26
2018-09-26
2018-01-31
SIMT Multi-Strategy Alternative Fund
SMSAX
<p style="margin:0pt 0pt 12pt 0pt; text-align: center;"><font style="font-size:13pt; font-family: Arial, Helvetica;">SEI INSTITUTIONAL MANAGED TRUST</font></p> <br/><p style="margin:0pt 0pt 13pt 0pt; text-align: center;"><font style="font-size:11pt; font-family: Arial, Helvetica;">Core Fixed Income Fund<br/>Multi-Strategy Alternative Fund<br/>Long/Short Alternative Fund<br/>(the "Funds")</font></p> <br/><p style="margin:0pt 0pt 20pt 0pt; text-align: center;"><font style="font-size:11pt; font-family: Arial, Helvetica;">Supplement Dated September 26, 2018<br/>to the Class F Prospectus dated January 31, 2018, as amended on April 19, 2018, May 1, 2018, <br/>May 3, 2018, July 9, 2018 and August 3, 2018</font></p> <br/><p style="margin:0pt 0pt 5.5pt 0pt; text-align: left;"><font style="font-size:8pt; font-family: Arial, Helvetica;"><b>This Supplement provides new and additional information beyond that contained in the Prospectus and should be read in conjunction with such Prospectus.</b></font></p> <br/><p style="margin:0pt 0pt 5.5pt 0pt; text-align: left;"><font style="font-size:8pt; font-family: Arial, Helvetica;"><i>The Prospectus is hereby amended and supplemented to reflect the following changes to the Funds.</i></font></p>
<p style="margin:0pt 0pt 5.5pt 0pt; text-align: left;"><font style="font-size:8pt; font-family: Arial, Helvetica;"><b><font style="text-decoration:underline">Changes to the Fees and Expenses of the Multi-Strategy Alternative Fund</font></b></font></p> <br/><p style="margin:0pt 0pt 5.5pt 0pt; text-align: left;"><font style="font-size:8pt; font-family: Arial, Helvetica;"><i>In the Fund Summary for the Multi-Strategy Alternative Fund, under the heading "Fees and Expenses" (but excluding the sub-heading titled "Portfolio Turnover"), the text and tables are hereby deleted and replaced with the following:</i></font></p> <br/><p style="margin:0pt 0pt 5.5pt 0pt; text-align: left;"><font style="font-size:8pt; font-family: Arial, Helvetica;">This table describes the fees and expenses that you may pay if you buy and hold Fund shares.</font></p>
0.0150
0.0000
0.0035
0.0059
0.0094
0.0053
0.0297
~ http://sei.com/20180926/role/ScheduleAnnualFundOperatingExpenses20001 column dei_DocumentInformationDocumentAxis compact ck0000804239_doc_Class_F_ProspectusMember column dei_LegalEntityAxis compact ck0000804239_S000028026Member row primary compact * ~
ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
The Fund is anticipated to incur AFFE during the current 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). The financial statements include only the direct operating expenses incurred by the Fund, not the indirect costs of investing in other investment companies.
Other Expenses have been restated to reflect estimated fees and expenses for the remainder of the current fiscal year and the upcoming fiscal year.
EXAMPLE
<p style="margin:0pt 0pt 0pt 0pt; text-align: left;"><font style="font-size:8pt; font-family: Arial, Helvetica;">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.</font></p>
300
918
1562
3290
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<p><font style="font-size: 8pt; font-family: Arial, Helvetica;"><em>There are no other changes to the Fees and Expenses of the Multi-Strategy Alternative Fund.</em></font></p> <br/><p style="margin:0pt 0pt 6pt 0pt; text-align: center;"><font style="font-size:8pt; font-family: Arial, Helvetica;"><b>PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE</b></font></p>
Although your actual costs may be higher or lower, based on these assumptions your costs would be:
SIMT Multi-Strategy Alternative Fund
SMUYX
<p style="margin:0pt 0pt 12pt 0pt; text-align: center;"><font style="font-size:13pt; font-family: Arial, Helvetica;">SEI INSTITUTIONAL MANAGED TRUST</font></p> <br/><p style="margin:0pt 0pt 13pt 0pt; text-align: center;"><font style="font-size:11pt; font-family: Arial, Helvetica;">Core Fixed Income Fund<br/>Multi-Strategy Alternative Fund<br/>Long/Short Alternative Fund<br/>(the "Funds")</font></p> <br/><p style="margin:0pt 0pt 20pt 0pt; text-align: center;"><font style="font-size:11pt; font-family: Arial, Helvetica;">Supplement Dated September 26, 2018<br/>to the Class Y Prospectus dated January 31, 2018, as amended on February 14, 2018, April 19, <br/>2018, May 1, 2018, May 3, 2018, July 9, 2018 and August 3, 2018</font></p> <br/><p style="margin:0pt 0pt 5.5pt 0pt; text-align: left;"><font style="font-size:8pt; font-family: Arial, Helvetica;"><b>This Supplement provides new and additional information beyond that contained in the Prospectus and should be read in conjunction with such Prospectus.</b></font></p> <br/><p style="margin:0pt 0pt 5.5pt 0pt; text-align: left;"><font style="font-size:8pt; font-family: Arial, Helvetica;"><i>The Prospectus is hereby amended and supplemented to reflect the following changes to the Funds.</i></font></p>
<p style="margin:0pt 0pt 5.5pt 0pt; text-align: left;"><font style="font-size:8pt; font-family: Arial, Helvetica;"><b><font style="text-decoration:underline">Changes to the Fees and Expenses of the Multi-Strategy Alternative Fund</font></b></font></p> <br/><p style="margin:0pt 0pt 5.5pt 0pt; text-align: left;"><font style="font-size:8pt; font-family: Arial, Helvetica;"><i>In the Fund Summary for the Multi-Strategy Alternative Fund, under the heading "Fees and Expenses" (but excluding the sub-heading titled "Portfolio Turnover"), the text and tables are hereby deleted and replaced with the following:</i></font></p> <br/><p style="margin:0pt 0pt 5.5pt 0pt; text-align: left;"><font style="font-size:8pt; font-family: Arial, Helvetica;">This table describes the fees and expenses that you may pay if you buy and hold Fund shares.</font></p>
0.0150
0.0000
0.0035
0.0034
0.0069
0.0053
0.0272
~ http://sei.com/20180926/role/ScheduleAnnualFundOperatingExpenses20005 column dei_DocumentInformationDocumentAxis compact ck0000804239_doc_Class_Y_ProspectusMember column dei_LegalEntityAxis compact ck0000804239_S000028026Member row primary compact * ~
ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
The Fund is anticipated to incur AFFE during the current 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). The financial statements include only the direct operating expenses incurred by the Fund, not the indirect costs of investing in other investment companies.
Other Expenses have been restated to reflect estimated fees and expenses for the remainder of the current fiscal year and the upcoming fiscal year.
EXAMPLE
<p style="margin:0pt 0pt 0pt 0pt; text-align: left;"><font style="font-size:8pt; font-family: Arial, Helvetica;">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.</font></p>
275
844
1440
3051
~ http://sei.com/20180926/role/ScheduleExpenseExampleTransposed20006 column dei_DocumentInformationDocumentAxis compact ck0000804239_doc_Class_Y_ProspectusMember column dei_LegalEntityAxis compact ck0000804239_S000028026Member row primary compact * ~
<p><font style="font-size: 8pt; font-family: Arial, Helvetica;"><em>There are no other changes to the Fees and Expenses of the Multi-Strategy Alternative Fund.</em></font></p> <br/><p style="margin:0pt 0pt 6pt 0pt; text-align: center;"><font style="font-size:8pt; font-family: Arial, Helvetica;"><b>PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE</b></font></p>
Although your actual costs may be higher or lower, based on these assumptions your costs would be: