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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. 25, 2015 | Apr. 19, 2014
Revenue from External Customer [Line Items] |  |
Consolidated net sales | $ 2,312,683 us-gaap_SalesRevenueNet | $ 2,333,727 us-gaap_SalesRevenueNet
Sales Revenue [Member] |  |
Revenue from External Customer [Line Items] |  |
Consolidated net sales | 2,312,683 us-gaap_SalesRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember | 2,333,727 us-gaap_SalesRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember
Percentage Consolidated Net Sale | 100.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember | 100.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember
Sales Revenue [Member] | Fuel [Member] |  |
Revenue from External Customer [Line Items] |  |
Consolidated net sales | 34,899 us-gaap_SalesRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_EnergyAxis = us-gaap_FuelMember | 54,970 us-gaap_SalesRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_EnergyAxis = us-gaap_FuelMember
Percentage Consolidated Net Sale | 1.50%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_EnergyAxis = us-gaap_FuelMember | 2.40%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_EnergyAxis = us-gaap_FuelMember
Sales Revenue [Member] | Non Perishables |  |
Revenue from External Customer [Line Items] |  |
Consolidated net sales | 1,472,711 us-gaap_SalesRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ProductOrServiceAxis = sptn_NonPerishablesMember | 1,475,060 us-gaap_SalesRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ProductOrServiceAxis = sptn_NonPerishablesMember
Percentage Consolidated Net Sale | 63.70%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ProductOrServiceAxis = sptn_NonPerishablesMember | 63.20%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ProductOrServiceAxis = sptn_NonPerishablesMember
Sales Revenue [Member] | Perishables |  |
Revenue from External Customer [Line Items] |  |
Consolidated net sales | 713,034 us-gaap_SalesRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ProductOrServiceAxis = sptn_PerishablesMember | 719,004 us-gaap_SalesRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ProductOrServiceAxis = sptn_PerishablesMember
Percentage Consolidated Net Sale | 30.80%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ProductOrServiceAxis = sptn_PerishablesMember | 30.80%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ProductOrServiceAxis = sptn_PerishablesMember
Sales Revenue [Member] | Pharmacy [Member] |  |
Revenue from External Customer [Line Items] |  |
Consolidated net sales | $ 92,039 us-gaap_SalesRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ProductOrServiceAxis = sptn_PharmacyMember | $ 84,693 us-gaap_SalesRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ProductOrServiceAxis = sptn_PharmacyMember
Percentage Consolidated Net Sale | 4.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ProductOrServiceAxis = sptn_PharmacyMember | 3.60%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ProductOrServiceAxis = sptn_PharmacyMember

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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
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