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Derivative Instruments and Hedging Activities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Sep. 30, 2018
Dec. 31, 2017
Sep. 30, 2017
Derivatives designated as hedging instruments:          
Derivative contracts          
Assets     $ 180 $ 363 $ 203
Liabilities     (862) (252) (420)
Derivatives designated as hedging instruments: | Foreign currency forward contracts          
Derivative contracts          
Notional Amounts     11,050 919 2,059
Assets     177 79 147
Derivatives designated as hedging instruments: | Commodity futures contracts          
Derivative contracts          
Notional Amounts     8,285 13,840 13,616
Assets     3 284 56
Liabilities     $ (862) $ (252) $ (420)
Forecast          
Derivative contracts          
Loss to be reclassified $ (43) $ (816)      
Forecast | Foreign currency forward contracts          
Derivative contracts          
Loss to be reclassified $ (87) $ (90)