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Associate Retirement Plans - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Jul. 01, 2023
Jul. 01, 2022
Dec. 30, 2023
Dec. 31, 2022
Jan. 01, 2022
Defined Benefit Plan Disclosure [Line Items]          
Defined contribution plans expense     $ 12,000 $ 12,000 $ 11,800
Cash surrender value of plan assets included in other long term assets     103,174 84,382  
Michigan Conference of Teamsters and Ohio Conference of Teamsters Health and Welfare Plans [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Contribution made in Health and Welfare Plan     17,000 13,400 13,200
Central States, Southeast and Southwest Areas Pension Plan [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Contribution made in Health and Welfare Plan     $ 13,100 12,300 13,500
Collective bargaining arrangement description     The Company is party to four CBAs that require contributions to the Central States Plan with expiration dates ranging from January 2025 to April 2026. These CBAs cover warehouse personnel and drivers in Grand Rapids, Michigan and Bellefontaine and Lima, Ohio.    
Central States, Southeast and Southwest Areas Pension Plan [Member] | Maximum [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Percentage representing contribution funded to plan total contribution     5.00%    
Retiree Medical Plan [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Increase (Decrease) in obligations     $ 6,600    
Net periodic benefit (income) expense     (2,674) $ (452) $ 643
2024     $ 1,300    
Spartan Nash Medical Plan [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Payment to retired participants $ 1,300 $ 2,000      
Net periodic benefit (income) expense $ 300 $ 700      
Postretirement Health [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Defined benefit plan employees minimum period of service     10 years