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Leases - Future Lease Commitments Under Operating Leases and Capital Leases (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 03, 2015
Operating Leased Assets [Line Items]
Operating Leases, 2015	$ 47,019us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
Operating Leases, 2016	38,661us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
Operating Leases, 2017	30,784us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
Operating Leases, 2018	25,263us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
Operating Leases, 2019	16,240us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
Operating Leases, Thereafter	72,052us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
Operating Leases, Total	230,019us-gaap_OperatingLeasesFutureMinimumPaymentsDue
Capital Leases, 2015	13,282us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent
Capital Leases, 2016	10,762us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears
Capital Leases, 2017	10,426us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears
Capital Leases, 2018	10,115us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears
Capital Leases, 2019	9,154us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears
Capital Leases, Thereafter	42,191us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter
Capital Leases, Total	95,930us-gaap_CapitalLeasesFutureMinimumPaymentsDue
Capital Leases, Interest	(31,510)us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments
Capital Leases, Present value of minimum lease obligations	64,420us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments
Capital Leases, Current maturities	8,656us-gaap_CapitalLeaseObligationsCurrent
Capital Leases, Long-term obligations	55,764us-gaap_CapitalLeaseObligationsNoncurrent
Used in Operations [Member]
Operating Leased Assets [Line Items]
Operating Leases, 2015	43,041us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent / us-gaap_MajorPropertyClassAxis = sptn_PropertyUsedInOperationsMember
Operating Leases, 2016	35,497us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears / us-gaap_MajorPropertyClassAxis = sptn_PropertyUsedInOperationsMember
Operating Leases, 2017	28,253us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears / us-gaap_MajorPropertyClassAxis = sptn_PropertyUsedInOperationsMember
Operating Leases, 2018	23,206us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears / us-gaap_MajorPropertyClassAxis = sptn_PropertyUsedInOperationsMember
Operating Leases, 2019	14,548us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears / us-gaap_MajorPropertyClassAxis = sptn_PropertyUsedInOperationsMember
Operating Leases, Thereafter	62,356us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter / us-gaap_MajorPropertyClassAxis = sptn_PropertyUsedInOperationsMember
Operating Leases, Total	206,901us-gaap_OperatingLeasesFutureMinimumPaymentsDue / us-gaap_MajorPropertyClassAxis = sptn_PropertyUsedInOperationsMember
Subleased to Others [Member]
Operating Leased Assets [Line Items]
Operating Leases, 2015	3,978us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent / us-gaap_MajorPropertyClassAxis = sptn_PropertyNotUsedInOperationsMember
Operating Leases, 2016	3,164us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears / us-gaap_MajorPropertyClassAxis = sptn_PropertyNotUsedInOperationsMember
Operating Leases, 2017	2,531us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears / us-gaap_MajorPropertyClassAxis = sptn_PropertyNotUsedInOperationsMember
Operating Leases, 2018	2,057us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears / us-gaap_MajorPropertyClassAxis = sptn_PropertyNotUsedInOperationsMember
Operating Leases, 2019	1,692us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears / us-gaap_MajorPropertyClassAxis = sptn_PropertyNotUsedInOperationsMember
Operating Leases, Thereafter	9,696us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter / us-gaap_MajorPropertyClassAxis = sptn_PropertyNotUsedInOperationsMember
Operating Leases, Total	$ 23,118us-gaap_OperatingLeasesFutureMinimumPaymentsDue / us-gaap_MajorPropertyClassAxis = sptn_PropertyNotUsedInOperationsMember

X

- Definition

Amount of capital lease obligation due within one year or the normal operating cycle, if longer.

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date.

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Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount necessary to reduce net minimum lease payments to present value for capital leases.

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Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes.

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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