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Associate Retirement Plans - Schedule of Amounts Recognized in Accumulated Other Comprehensive Income (Detail) $ in Thousands | 12 Months Ended
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Jan. 02, 2016 USD ($)
SpartanNash Company Pension Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Net actuarial loss | $ 111
Spartan Stores Medical Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Prior service credit | (158)
Net actuarial loss | $ 42

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