Net Fair Value of Commodity Price Risk (Detail) - USD ($) $ in Thousands	Oct. 05, 2019	Dec. 29, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Assets	$ 165	$ 501
Liabilities	(15,631)	(8,935)
Net Fair Value	(15,466)	(8,434)
Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Assets	165	501
Liabilities	(15,631)	(8,935)
Net Fair Value	(15,466)	(8,434)
Other Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Assets	131	501
Other Current Assets | Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Assets	131	501
Other LongTerm Assets
Derivative Instruments, Gain (Loss) [Line Items]
Assets	34
Other LongTerm Assets | Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Assets	34
Other Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Liabilities	(14,048)	(7,732)
Other Current Liabilities | Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Liabilities	(14,048)	(7,732)
Other LongTerm Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Liabilities	(1,583)	(1,203)
Other LongTerm Liabilities | Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Liabilities	$ (1,583)	$ (1,203)