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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
	Apr. 25, 2015	Apr. 19, 2014
Revenue from External Customer [Line Items]
Consolidated net sales	$ 2,312,683us-gaap_SalesRevenueNet	$ 2,333,727us-gaap_SalesRevenueNet
Sales Revenue [Member]
Revenue from External Customer [Line Items]
Consolidated net sales	2,312,683us-gaap_SalesRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember	2,333,727us-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	34,899us-gaap_SalesRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_EnergyAxis = us-gaap_FuelMember	54,970us-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	1,472,711us-gaap_SalesRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ProductOrServiceAxis = sptn_NonPerishablesMember	1,475,060us-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	713,034us-gaap_SalesRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ProductOrServiceAxis = sptn_PerishablesMember	719,004us-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	$ 92,039us-gaap_SalesRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ProductOrServiceAxis = sptn_PharmacyMember	$ 84,693us-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

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

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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)

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