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FAIR VALUE MEASUREMENTS (Schedule of Assets and Liabilities Measured on a Recurring Basis) (Details) - Recurring - USD ($)
$ in Thousands
Mar. 28, 2021
Dec. 27, 2020
Commodity futures instruments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets $ 4,171 $ 13,285
Derivative liabilities (5,153) (4,496)
Commodity futures instruments | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 4,171 13,285
Derivative liabilities (5,153) (4,496)
Commodity options instruments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 1,903 10,774
Derivative liabilities (8,710) (2,035)
Commodity options instruments | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 1,903 10,774
Derivative liabilities (8,710) (2,035)
Foreign currency instruments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 2,410 2,204
Derivative liabilities (7,180) (428)
Foreign currency instruments | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 2,410 2,204
Derivative liabilities (7,180) (428)
Interest rate swap instrument    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities (538) (640)
Interest rate swap instrument | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities (538) (640)
Sales contract instruments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities (18,104) 0
Sales contract instruments | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities $ (18,104) $ 0