Derivative Instruments Located on Condensed Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Oct. 06, 2018	Dec. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	$ 4,489	$ 291
Derivative Liabilities	1,796	10,886
Commodity Contract \| Other Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	3,872	259
Commodity Contract \| Other LongTerm Assets
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	617	32
Commodity Contract \| Other Accrued Labilities
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities	1,180	10,247
Commodity Contract \| Other LongTerm Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities	$ 616	$ 639

Fair value of all asset derivatives designated as cash flow hedging instruments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959

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Fair value of all liability derivatives designated as cash flow hedging instruments.

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