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Net Fair Value of Commodity Price Risk (Detail) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Assets	$ 3,780	$ 501
Liabilities	(1,606)	(8,935)
Net Fair Value	2,174	(8,434)
Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Assets	3,780	501
Liabilities	(1,606)	(8,935)
Net Fair Value	2,174	(8,434)
Other Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Assets	3,191	501
Other Current Assets | Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Assets	3,191	501
Other LongTerm Assets
Derivative Instruments, Gain (Loss) [Line Items]
Assets	589
Other LongTerm Assets | Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Assets	589
Other Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Liabilities	(814)	(7,732)
Other Current Liabilities | Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Liabilities	(814)	(7,732)
Other LongTerm Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Liabilities	(792)	(1,203)
Other LongTerm Liabilities | Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Liabilities	$ (792)	$ (1,203)

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