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Financial Instruments and Risk Management (Effect and Classification of Derivative Instuments) (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) recognized in other comprehensive income, net of tax $ (3,903) $ (3,347) $ 5,376 $ 11,015
Designated as Hedging Instrument [Member] | Cost of Sales | Cash Flow Hedging [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) reclassified from accumulated other comprehensive income to income for the effective portion (348) 1,826 424 4,621
Designated as Hedging Instrument [Member] | Sales [Member] | Cash Flow Hedging [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) reclassified from accumulated other comprehensive income to income for the effective portion (111) 165 (11) 43
Designated as Hedging Instrument [Member] | Other Non-Operating Income (Expense) [Member] | Cash Flow Hedging [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Loss reclassified from accumulated other comprehensive income to income as a result of cash flow hedge discontinuance 0 6 106 1,117
Not Designated as Hedging Instrument [Member] | Other Non-Operating Income (Expense) [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) recognized in income $ (1,619) $ (319) $ (722) $ 1,330