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Restructuring and Asset Impairment - Schedule of Restructuring and Asset Impairment (Parenthetical) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 12, 2014 | Jul. 18, 2015 | Jul. 12, 2014
Restructuring Cost And Reserve [Line Items] |  |  |
Changes in estimates | $ 307 | $ (287) | $ (92)
Retail Segment [Member] |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Changes in estimates |  | $ (287) | $ (379)

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- Definition Restructuring reserve change in estimates. + References No definition available. + Details
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Namespace Prefix: | sptn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_RestructuringCostAndReserveLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=sptn_RetailSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |