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Derivative Instruments and Hedges (Fair Value of Forward Exchange Contracts) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Forward Contracts        
Derivative [Line Items]        
Gains (losses) recognized in income $ (3,520) $ (1,413) $ (61) $ (2,694)