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Operating Segment Information - Summary of Sales by Type of Similar Products and Services (Detail) (USD $) In Thousands, unless otherwise specified | 4 Months Ended
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Apr. 19, 2014 | Apr. 27, 2013
Revenue from External Customer [Line Items] |  |
Consolidated net sales | $ 2,333,727 | $ 780,278
Percentage Consolidated Net Sale | 100.00% | 100.00%
Non Perishables [Member] |  |
Revenue from External Customer [Line Items] |  |
Consolidated net sales | 1,475,060 | 385,426
Percentage Consolidated Net Sale | 63.20% | 49.40%
Perishables [Member] |  |
Revenue from External Customer [Line Items] |  |
Consolidated net sales | 719,004 | 276,202
Percentage Consolidated Net Sale | 30.80% | 35.40%
Pharmacy [Member] |  |
Revenue from External Customer [Line Items] |  |
Consolidated net sales | 84,693 | 64,186
Percentage Consolidated Net Sale | 3.60% | 8.20%
Fuel [Member] |  |
Revenue from External Customer [Line Items] |  |
Consolidated net sales | $ 54,970 | $ 54,464
Percentage Consolidated Net Sale | 2.40% | 7.00%

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- Definition Percentage Consolidated Net Sale + References No definition available. + Details
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Namespace Prefix: | sptn_
Data Type: | num:percentItemType
Balance Type: | na
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

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + 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 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
Name: | us-gaap_SalesRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration