FAIR VALUE MEASUREMENT (Schedule of Assets and Liabilities Measured on a Recurring Basis) (Details) - Recurring - USD ($) $ in Thousands	Sep. 26, 2021	Dec. 27, 2020
Commodity derivative
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	$ 8,443	$ 24,059
Derivative liabilities	(29,744)	(6,531)
Commodity derivative | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	8,443	24,059
Derivative liabilities	(29,744)	(6,531)
Foreign currency derivative
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,814	2,204
Derivative liabilities	(139)	(428)
Foreign currency derivative | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,814	2,204
Derivative liabilities	(139)	(428)
Sales contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	2,201
Sales contract | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	2,201
Interest rate swap derivative liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities	(345)	(640)
Interest rate swap derivative liabilities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities	0	$ (640)
Interest rate swap derivative liabilities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities	$ (345)