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Long-Term Debt - Additional Information (Detail) | Jan. 09, 2015
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Long Term Debt [Abstract] |
Debt instrument applicable margin interest rate | 0.25%sptn_DebtInstrumentApplicableMarginInterestRate

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- Definition Debt instrument applicable margin interest rate. + References No definition available. + Details
Name: | sptn_DebtInstrumentApplicableMarginInterestRate
Namespace Prefix: | sptn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_LongTermDebtAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration