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Associate Retirement Plans - Components of Net Periodic Pension and Postretirement Benefit Cost (Income) (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 28, 2024
Dec. 30, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Interest Expense, Nonoperating Interest Expense, Nonoperating Interest Expense, Nonoperating
Retiree Medical Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 0 $ 0 $ 76
Interest cost 17 85 185
Amortization of Prior Service Credit (1,653) (3,307) (1,653)
Recognized actuarial net loss 94 249 200
Net periodic benefit income (1,542) (2,973) (1,192)
Settlement Expenses 135 299 740
Total net periodic benefit income $ (1,407) $ (2,674) $ (452)
Weighted average assumptions used to determine net periodic benefit income:      
Discount rate 5.65% 5.62% 2.90%