Net Fair Value of Commodity Price Risk (Detail) - USD ($) $ in Thousands	Oct. 03, 2020	Dec. 28, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Assets	$ 7,826	$ 3,780
Liabilities	(159)	(1,606)
Net Fair Value	7,667	2,174
Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Assets	7,826	3,780
Liabilities	(159)	(1,606)
Net Fair Value	7,667	2,174
Other Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Assets	7,372	3,191
Other Current Assets | Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Assets	7,372	3,191
Other LongTerm Assets
Derivative Instruments, Gain (Loss) [Line Items]
Assets	454	589
Other LongTerm Assets | Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Assets	454	589
Other Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Liabilities	(159)	(814)
Other Current Liabilities | Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Liabilities	$ (159)	(814)
Other LongTerm Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Liabilities		(792)
Other LongTerm Liabilities | Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Liabilities		$ (792)