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v3.3.0.814

Long-Term Debt - Additional Information (Detail) | Jan. 09, 2015
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Line Of Credit [Member] | Amended and Restated Loan and Security Agreement [Member] |
Debt Instrument [Line Items] |
Decrease in debt instrument applicable margin interest rate | (0.25%)

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- Definition Incremental percentage increase (decrease) in the stated rate on a debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentInterestRateIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_DebtInstrumentAxis=sptn_AmendedCreditAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |