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Acquisitions - Additional Information (Detail) (USD $)
Dec. 27, 2014
Sep. 27, 2014
Dec. 28, 2013
Apr. 01, 2014
Business Acquisition [Line Items]        
Excess of purchase price included in goodwill $ 208,233,000us-gaap_Goodwill $ 208,233,000us-gaap_Goodwill $ 205,756,000us-gaap_Goodwill  
Envincio, LLC [Member]        
Business Acquisition [Line Items]        
Purchase of certain assets       20,300,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
/ us-gaap_BusinessAcquisitionAxis
= cent_EnvincioLlcMember
Excess of purchase price included in goodwill       $ 2,477,000us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= cent_EnvincioLlcMember