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Derivative Instruments - Income Statement (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Commodity Forward Derivative | Designated as Hedging Instrument | Cost of sales        
Derivative Instruments, Gain (Loss)        
Amount of (Gain)/Loss Recognized $ 1,295 $ 3,145 $ 5,234 $ 6,994
Interest rate swap contract | Designated as Hedging Instrument | Interest expense        
Derivative Instruments, Gain (Loss)        
Amount of (Gain)/Loss Recognized (1,537) 323 (2,852) 323
Foreign currency derivatives | Not Designated as Hedging Instrument | Cost Of Good Sold Other Expense Income [Member]        
Derivative Instruments, Gain (Loss)        
Amount of (Gain)/Loss Recognized 243 $ (173) 959 648
Commodity derivative contracts | Not Designated as Hedging Instrument | Interest expense        
Derivative Instruments, Gain (Loss)        
Amount of (Gain)/Loss Recognized $ 207   $ 321 $ 0