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Long-Term Debt - Additional Information (Detail)	Jan. 09, 2015
Long Term Debt [Abstract]
Debt instrument applicable margin interest rate	0.25%sptn_DebtInstrumentApplicableMarginInterestRate

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- Definition

Debt instrument applicable margin interest rate.

+ References

No definition available.

+ Details

Name:	sptn_DebtInstrumentApplicableMarginInterestRate
Namespace Prefix:	sptn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

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- Details

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