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Other Intangible Assets - Components of Gross and Net Acquired Intangible Assets (Detail) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 27, 2014 | Dec. 28, 2013 | Sep. 27, 2014
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross | $ 145,000,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill | $ 132,700,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill | $ 145,000,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill
Accumulated Amortization | (39,800,000)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization | (35,700,000)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization | (38,900,000)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Impairment | (18,100,000)us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill | (18,100,000)us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill | (18,100,000)us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill
Net Carrying Value | 87,061,000 us-gaap_IntangibleAssetsNetExcludingGoodwill | 78,856,000 us-gaap_IntangibleAssetsNetExcludingGoodwill | 87,997,000 us-gaap_IntangibleAssetsNetExcludingGoodwill
Marketing-Related Intangible Assets [Member] |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross | 75,100,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember | 72,100,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember | 75,100,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember
Accumulated Amortization | (10,100,000)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember | (9,100,000)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember | (9,900,000)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember
Impairment | (16,900,000)us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember | (16,900,000)us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember | (16,900,000)us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember
Net Carrying Value | 48,100,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember | 46,100,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember | 48,300,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember
Other Acquired Intangible Assets [Member] |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross | 27,100,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember | 17,800,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember | 27,100,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember
Accumulated Amortization | (9,000,000)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember | (8,100,000)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember | (8,800,000)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember
Impairment | (1,200,000)us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember | (1,200,000)us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember | (1,200,000)us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember
Net Carrying Value | 16,900,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember | 8,500,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember | 17,100,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember
Amortizable [Member] | Marketing-Related Intangible Assets [Member] |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross | 15,500,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | 12,500,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | 15,500,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember
Accumulated Amortization | (10,100,000)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | (9,100,000)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | (9,900,000)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember
Impairment | 0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | 0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | 0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember
Net Carrying Value | 5,400,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | 3,400,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | 5,600,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember
Amortizable [Member] | Customer-Related Intangible Assets [Member] |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross | 42,800,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | 42,800,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | 42,800,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember
Accumulated Amortization | (20,700,000)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | (18,500,000)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | (20,200,000)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember
Impairment | 0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | 0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | 0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember
Net Carrying Value | 22,100,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | 24,300,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | 22,600,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember
Amortizable [Member] | Other Acquired Intangible Assets [Member] |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross | 19,400,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | 16,600,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | 19,400,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember
Accumulated Amortization | (9,000,000)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | (8,100,000)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | (8,800,000)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember
Impairment | 0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | 0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | 0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember
Net Carrying Value | 10,400,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | 8,500,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember | 10,600,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_AmortizableIntangibleAssetsMember
Nonamortizable [Member] | Marketing-Related Intangible Assets [Member] |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross | 59,600,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember | 59,600,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember | 59,600,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember
Accumulated Amortization | 0 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember | 0 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember | 0 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember
Impairment | (16,900,000)us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember | (16,900,000)us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember | (16,900,000)us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember
Net Carrying Value | 42,700,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember | 42,700,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember | 42,700,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_MarketingRelatedIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember
Nonamortizable [Member] | Other Acquired Intangible Assets [Member] |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross | 7,700,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember | 1,200,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember | 7,700,000 us-gaap_IntangibleAssetsGrossExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember
Accumulated Amortization | 0 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember | 0 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember | 0 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember
Impairment | (1,200,000)us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember | (1,200,000)us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember | (1,200,000)us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember
Net Carrying Value | $ 6,500,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember | $ 0 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember | $ 6,500,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / us-gaap_StatementScenarioAxis = cent_NonamortizableMember

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