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Income Taxes - Net Operating Losses (Details) (Federal And State Jurisdiction [Member], USD $)
In Millions, unless otherwise specified
Jan. 03, 2015
Federal And State Jurisdiction [Member]
 
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards $ 22.8us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= midd_FederalAndStateJurisdictionMember