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Changes to Goodwill From Acquisition (Detail) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Oct. 04, 2014
Goodwill [Line Items]  
Beginning balance $ 282,404
Net changes to goodwill 3,180
Ending Balance 282,960
Acquired Hostess Bread Asset
 
Goodwill [Line Items]  
Beginning balance 5,419
Net changes to goodwill 3,180
Ending Balance 8,599
Acquired Hostess Bread Asset | Spare parts and final fair value adjustments
 
Goodwill [Line Items]  
Net changes to goodwill (3,503)
Acquired Hostess Bread Asset | Property, plant and equipment final fair value adjustments
 
Goodwill [Line Items]  
Net changes to goodwill $ 6,683