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Commitments and Contingencies - Additional Information (Detail) (Maximum [Member], Nash-Finch Company [Member], USD $) | 9 Months Ended
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Oct. 04, 2014
Maximum [Member] | Nash-Finch Company [Member] |
Contingencies And Commitments [Line Items] |
Legal fees and expense | $ 550,000

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- Details
Name: | sptn_ContingenciesAndCommitmentsLineItems
Namespace Prefix: | sptn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
Name: | us-gaap_LegalFees
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration