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Business Combinations - Additional Information (Detail) (USD $) | Jun. 28, 2014 | Sep. 28, 2013 | Jun. 29, 2013 | Dec. 29, 2012 FourStar Microbial [Member] | Apr. 01, 2014 Envincio LLC [Member]
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Business Acquisition [Line Items] |  |  |  |  |
Acquired remaining majority interest in cash |  |  |  | $ 4,835,000 |
Contingent future performance-based payments |  |  |  | 4,200,000 |
Excess of purchase price recorded as goodwill | 205,756,000 | 205,756,000 | 210,223,000 | 3,243,000 |
Purchase of certain assets |  |  |  |  | 20,000,000
Excess of purchase price included in deferred taxes and other assets | $ 26,689,000 | $ 13,969,000 | $ 19,049,000 |  | $ 14,000,000

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