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		3 Months Ended		9 Months Ended
		Oct. 07, 2017	Oct. 08, 2016	Oct. 07, 2017	Oct. 08, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Net change in fair value of derivatives	[1]	$ (9,652)	$ 3,433	$ (5,932)	$ 2,496
Production costs		476,170	476,760	1,552,263	1,575,905
Income before income taxes		(56,496)	61,448	105,469	232,251
Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Income before income taxes	[2]	372	742	1,166	2,688
Interest Rate Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Net change in fair value of derivatives	[1]		666		666
Interest Rate Contracts | Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	[2]	21	38	68	121
Commodity Contract
Derivative Instruments, Gain (Loss) [Line Items]
Net change in fair value of derivatives	[1]	(9,652)	2,767	(5,932)	1,830
Commodity Contract | Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Production costs	[2],[3]	$ 351	$ 704	$ 1,098	$ 2,567

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

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

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