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

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