XML 60 R48.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Commitments and Contingencies - Additional Information (Detail) | 9 Months Ended
--- | ---
Oct. 08, 2016
Norfolk, Virginia and Columbus, Georgia distribution centers |
Commitments And Contingencies [Line Items] |
Labor union agreement negotiated term | 3 years

X
- Definition Commitments and Contingencies. + References No definition available. + Details
Name: | sptn_CommitmentsAndContingenciesLineItems
Namespace Prefix: | sptn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Labor union agreement negotiated term. + References No definition available. + Details
Name: | sptn_LaborUnionAgreementNegotiatedTerm
Namespace Prefix: | sptn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementGeographicalAxis=sptn_NorfolkVirginiaAndColumbusGeorgiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |