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Goodwill - Additional Information (Detail) - Segments | 12 Months Ended
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Sep. 24, 2016 | Sep. 26, 2015 | Sep. 27, 2014
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |
Number of reportable segments | 2 |  |
Fair value of reporting segments exceeds carrying value, percentage |  | 10.00% | 10.00%

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- Definition Fair Value of Reporting Segment Exceeds Carrying Value Percentage + References No definition available. + Details
Name: | cent_FairValueOfReportingSegmentExceedsCarryingValuePercentage
Namespace Prefix: | cent_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration