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Long-Term Debt - Additional Information (Detail)	Jan. 09, 2015
Amended and Restated Loan and Security Agreement | Wells Fargo Capital Finance, LLC
Debt Instrument [Line Items]
Debt instrument applicable margin interest rate	0.25%

X

- Definition

Incremental percentage increase (decrease) in the stated rate on a debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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- 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

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

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- Details

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

X

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=sptn_WellsFargoCapitalFinanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: