Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments And Risk Management (Effect And Classification Of Derivative Instruments) (Details)

v3.20.2
Financial Instruments And Risk Management (Effect And Classification Of Derivative Instruments) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Derivative Instruments Designated As Cash Flow Hedges [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) recognized in other comprehensive income or loss $ (6,398) $ 6,315 $ 4,617 $ 9,119
Cost of Sales [Member] | Derivative Instruments Designated As Cash Flow Hedges [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) reclassified from accumulated other comprehensive income or loss to income or loss for the effective portion 6,906 5,087 11,527 7,208
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net 0 0 0 2,380
Sales [Member] | Derivative Instruments Designated As Cash Flow Hedges [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) reclassified from accumulated other comprehensive income or loss to income or loss for the effective portion 80 172 123 282
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net 0 0 0 (31)
Other Non-operating Income (Expense) [Member] | Derivative Instruments Not Designated As Cash Flow Hedges [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) reclassified from accumulated other comprehensive income or loss to income or loss for the effective portion 60 0 1,177 0
Gain (loss) recognized in income or loss $ (1,795) $ 1,855 $ (465) $ 1,281