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Associate Retirement Plans - Additional Information (Detail) - USD ($) $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
Jun. 28, 2024 | Jul. 01, 2023 | Dec. 28, 2024 | Dec. 30, 2023 | Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined contribution plans expense |  |  | $ 11,900 | $ 12,000 | $ 12,000
Cash surrender value of plan assets included in other long term assets |  |  | 104,434 | 103,174 |
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 |  |  | 15,900 | 17,000 | 13,400
Central States, Southeast and Southwest Areas Pension Plan [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Contribution made in Health and Welfare Plan |  |  | $ 13,500 | 13,100 | 12,300
Collective bargaining arrangement description |  |  | The Company is party to five CBAs that require contributions to the Central States Plan with expiration dates ranging from April 2026 to February 2030. 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 |  |  | (1,407) | (2,674) | (452)
Fair value of plan assets |  |  | $ 0 | $ 0 | $ 0
Spartan Nash Medical Plan [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Payment to retired participants | $ 1,300 | $ 1,300 |  |  |
Net periodic benefit (income) expense | $ 100 | $ 300 |  |  |
Postretirement Health [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined benefit plan employees minimum period of service |  |  | 10 years |  |

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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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