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Restructuring and Asset Impairment - Schedule of Restructuring and Asset Impairment (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jul. 12, 2014	Jul. 18, 2015	Jul. 12, 2014
Restructuring Cost And Reserve [Line Items]
Changes in estimates	$ 307	$ (287)	$ (92)
Retail Segment [Member]
Restructuring Cost And Reserve [Line Items]
Changes in estimates		$ (287)	$ (379)

X

- Definition

Restructuring reserve change in estimates.

+ References

No definition available.

+ Details

Name:	sptn_RestructuringReserveChangeInEstimates
Namespace Prefix:	sptn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_RestructuringCostAndReserveLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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