XML 54 R40.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Long-Term Debt - Summary of Debt Instruments (Parenthetical) (Detail) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 15, 2017 | Dec. 31, 2016
Senior Secured Term Loan [Member] |  |
Debt Instrument [Line Items] |  |
Notes maturity date | Dec. 20, 2021 | Dec. 20, 2021
Long-term Debt [Member] |  |
Debt Instrument [Line Items] |  |
Other debt, due date, start | 2019 | 2019
Other debt, due date, end | 2020 | 2020
Long-term Debt [Member] | Minimum [Member] |  |
Debt Instrument [Line Items] |  |
Interest Rate Range | 2.61% | 2.61%
Long-term Debt [Member] | Maximum [Member] |  |
Debt Instrument [Line Items] |  |
Interest Rate Range | 8.75% | 8.75%
Senior Secured Revolving Credit Facility | Revolving credit agreement [Member] |  |
Debt Instrument [Line Items] |  |
Notes maturity date | Dec. 20, 2021 | Dec. 20, 2021

X
- Definition Debt instruments maturity date range end. + References No definition available. + Details
Name: | sptn_DebtInstrumentsMaturityDateRangeEnd
Namespace Prefix: | sptn_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt instruments maturity date range start. + References No definition available. + Details
Name: | sptn_DebtInstrumentsMaturityDateRangeStart
Namespace Prefix: | sptn_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentMaturityDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=sptn_SeniorSecuredTermLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_LongTermDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=sptn_SeniorSecuredRevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |