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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 |  |

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- Definition Description of the significant collective-bargaining arrangements within the range of expiration dates for collective-bargaining arrangements requiring contributions to a multiemployer plan as well as other information to help investors understand the significance of the collective-bargaining agreements and when they expire. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (d) -SubTopic 80 -Topic 715 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480576/715-80-50-5 + Details
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