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Restructuring and Asset Impairment - Schedule of Restructuring,Asset Impairment and Other (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified | 4 Months Ended
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Apr. 19, 2014
Restructuring Cost and Reserve [Line Items] |
Changes in estimates | $ (399)
Retail Segment [Member] |
Restructuring Cost and Reserve [Line Items] |
Changes in estimates | $ (379)

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- Definition Restructuring Reserve Change In Estimates + References No definition available. + Details
Name: | sptn_RestructuringReserveChangeInEstimates
Namespace Prefix: | sptn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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