v3.10.0.1

Tax Receivable Agreement - (Details) - USD ($) $ in Millions | Jan. 26, 2018 | Sep. 30, 2018
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
Payment made to terminate future payments | $ 34.0 |
Additional payment required to terminate future payments | $ 10.0 |
Expected cash tax savings rate |  | 26.90%

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- Definition Tax Receivable Agreement, Expected Cash Tax Savings Rate + References No definition available. + Details
Name: | twnk_TaxReceivableAgreementExpectedCashTaxSavingsRate
Namespace Prefix: | twnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Tax Receivable Agreement, Payment Made to Terminate Future Payments + References No definition available. + Details
Name: | twnk_TaxReceivableAgreementPaymentMadetoTerminateFuturePayments
Namespace Prefix: | twnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Tax Receivable Agreement, Payment Made to Terminate Future Payments, Additional Payment + References No definition available. + Details
Name: | twnk_TaxReceivableAgreementPaymentMadetoTerminateFuturePaymentsAdditionalPayment
Namespace Prefix: | twnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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