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LEASE COMMITMENTS - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011 | Jan. 01, 2011 | Jan. 02, 2010
Leases Disclosure [Line Items] |  |  |
Rental expense pertaining to the operating leases | $ 6.6 | $ 5.6 | $ 5.6
Reserves to cover the remaining costs of obligations under idle leases | $ 0.2 |  |

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- Details
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Data Type: | xbrli:stringItemType
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Period Type: | duration

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- Definition Operating Leases, Future Minimum Payments, Remainder of the Period + References No definition available. + Details
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Namespace Prefix: | midd_
Data Type: | xbrli:monetaryItemType
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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