Effect of Derivative Instruments for Deferred Gains And (Losses) on Closed Contracts and Effective Portion in Fair Value on AOCI, Utilized for Risk Management Purposes (Detail) - USD ($) $ in Thousands		4 Months Ended
		Apr. 22, 2023	Apr. 23, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) or Gain Recognized in AOCI on Derivatives(Effective Portion)	[1]	$ (3,044)	$ 11,220
Production costs		800,852	724,592
Income before income taxes		89,965	110,112
Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Income before income taxes	[2]	(940)	969
Interest Rate Contracts | Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	[2]	115	115
Commodity Contract
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) or Gain Recognized in AOCI on Derivatives(Effective Portion)	[1]	(3,044)	11,220
Commodity Contract | Reclassification out of Accumulated Other Comprehensive Income | Product
Derivative Instruments, Gain (Loss) [Line Items]
Production costs	[2],[3]	$ (1,055)	$ 854

[1] Amounts in parentheses indicate debits to determine net income.

[2] Amounts in parentheses, if any, indicate credits to determine net income.

[3] Included in materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately).