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Derivative Instruments and Hedging Activities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Dec. 31, 2018
Sep. 30, 2018
Derivatives designated as hedging instruments:          
Derivative contracts          
Assets     $ 26 $ 92 $ 180
Liabilities     (256) (1,086) (862)
Derivatives designated as hedging instruments: | Foreign currency forward contracts          
Derivative contracts          
Notional Amounts     8,294 11,050 11,050
Assets         177
Liabilities     (122) (407)  
Derivatives designated as hedging instruments: | Commodity futures contracts          
Derivative contracts          
Notional Amounts     4,726 9,580 8,285
Assets     26 92 3
Liabilities     $ (134) $ (679) $ (862)
Forecast | Foreign currency forward contracts          
Derivative contracts          
Loss to be reclassified $ (84) $ (38)      
Forecast | Commodity futures contracts          
Derivative contracts          
Gain (loss) to be reclassified $ (108)