FAIR VALUE MEASUREMENTS (Schedule of Assets and Liabilities Measured on a Recurring Basis) (Details) - Recurring - USD ($) $ in Thousands	Apr. 01, 2018	Dec. 31, 2017
Commodity futures instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	$ 4,881	$ 301
Derivative liabilities	(3,678)	(296)
Commodity futures instruments | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	4,881	301
Derivative liabilities	(3,678)	(296)
Commodity options instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	3,229	421
Derivative liabilities	(6,129)	(3,551)
Commodity options instruments | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	3,229	421
Derivative liabilities	(6,129)	(3,551)
Foreign currency instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	483	45
Derivative liabilities	(433)	(211)
Foreign currency instruments | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	483	45
Derivative liabilities	$ (433)	$ (211)