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Derivative Instruments and Hedges (Fair Value Balance Sheet Disclosures) (Details) - Not Designated as Hedging Instrument - Foreign Exchange Contract - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Derivative [Line Items]    
Current derivative assets $ 2,416 $ 2,857
Noncurrent derivative assets 17 249
Current derivative liabilities 1,665 682
Noncurrent derivative liabilities $ 2 $ 0