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 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 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 $ (3,347) $ (464) $ 11,015 $ 2,804
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 1,826 925 4,621 2,121
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net 0 931 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 165 75 43 110
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net 0 (26) 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 6 0 1,117 0
Gain (loss) recognized in income or loss $ (319) $ (1,137) $ 1,330 $ (574)