Quarterly report pursuant to Section 13 or 15(d)

Other Intangible Assets - Additional Information (Detail)

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Other Intangible Assets - Additional Information (Detail) (USD $)
 3 Months Ended 12 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Sep. 28, 2013
Finite-Lived Intangible Assets [Line Items]      
Indefinite-lived intangibles assets, impairment charge     $ 0
Amortization expense for intangibles 1,000,000 1,100,000  
Estimated annual amortization expense related to acquired intangible assets, 2014 5,000,000    
Estimated annual amortization expense related to acquired intangible assets, 2015 5,000,000    
Estimated annual amortization expense related to acquired intangible assets, 2016 5,000,000    
Estimated annual amortization expense related to acquired intangible assets, 2017 5,000,000    
Estimated annual amortization expense related to acquired intangible assets, 2018 5,000,000    
Marketing-related intangible assets [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Weighted average remaining lives of acquired intangible assets 6 years    
Marketing-related intangible assets [Member] | FourStar Microbial [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets acquired   100,000  
Customer-related intangible assets [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Weighted average remaining lives of acquired intangible assets 15 years    
Customer-related intangible assets [Member] | FourStar Microbial [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets acquired   100,000  
Other acquired intangible assets [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Weighted average remaining lives of acquired intangible assets 15 years    
Other acquired intangible assets [Member] | FourStar Microbial [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets acquired   $ 6,900,000  
Minimum [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Weighted average remaining lives of acquired intangible assets 1 year    
Maximum [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Weighted average remaining lives of acquired intangible assets 25 years