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Share-Based Payments - Summary of Share-based Payment Expense Recognized as a Reduction of Net Sales in Condensed Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 17, 2021 | Jul. 17, 2021
Employee Service Share Based Compensation Aggregate Disclosures [Abstract] |  |
Warrant expense | $ 430 | $ 1,075
Income tax benefit | (37) | (95)
Warrant expense, net of tax | $ 393 | $ 980

X
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- Definition Class of warrant or right stock based compensation expense net of tax. + References No definition available. + Details
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Namespace Prefix: | sptn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- References No definition available. + Details
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