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Commitments and Contingencies - Additional Information (Detail) - Norfolk, Virginia facility	4 Months Ended
	Apr. 23, 2016
Commitments And Contingencies [Line Items]
Collective bargaining agreement term	3 years
Collective bargaining agreement term, start date	Apr. 23, 2016
Collective bargaining agreement term, end date	Apr. 27, 2019
Collective bargaining agreement, expiration date of contract extension	Jun. 26, 2016

X

- Definition

Collective bargaining agreement, expiration date of contract extension

+ References

No definition available.

+ Details

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Namespace Prefix:	sptn_
Data Type:	xbrli:dateItemType
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Period Type:	duration

X

- Definition

Collective bargaining agreement term.

+ References

No definition available.

+ Details

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Namespace Prefix:	sptn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Collective bargaining agreement term, end date.

+ References

No definition available.

+ Details

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Namespace Prefix:	sptn_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Collective bargaining agreement term, start date.

+ References

No definition available.

+ Details

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Namespace Prefix:	sptn_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Commitments and Contingencies.

+ References

No definition available.

+ Details

Name:	sptn_CommitmentsAndContingenciesLineItems
Namespace Prefix:	sptn_
Data Type:	xbrli:stringItemType
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X

- Details

Name:	us-gaap_StatementGeographicalAxis=sptn_NorfolkVirginiaMember
Namespace Prefix:
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Balance Type:
Period Type: