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Restructuring, Asset Impairment and Other - Schedule of Restructuring,Asset Impairment and Other (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Dec. 28, 2013	Jan. 03, 2015	Mar. 30, 2013
Restructuring Cost And Reserve [Line Items]
Changes in estimates	$ (31)sptn_RestructuringReserveChangeInEstimates	$ 781sptn_RestructuringReserveChangeInEstimates	$ (93)sptn_RestructuringReserveChangeInEstimates
Retail Segment [Member]
Restructuring Cost And Reserve [Line Items]
Changes in estimates		600sptn_RestructuringReserveChangeInEstimates / us-gaap_StatementBusinessSegmentsAxis = sptn_RetailSegmentMember
Food Distribution Segment [Member]
Restructuring Cost And Reserve [Line Items]
Changes in estimates		$ 200sptn_RestructuringReserveChangeInEstimates / us-gaap_StatementBusinessSegmentsAxis = sptn_FoodDistributionSegmentMember

X

- Definition

Restructuring reserve change in estimates.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=sptn_RetailSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: