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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
Sep. 30, 2020
Dec. 31, 2019
Derivative [Line Items]    
Current derivative assets $ 1,082 $ 892
Noncurrent derivative assets 65 15
Current derivative liabilities 682 3,418
Noncurrent derivative liabilities $ 4 $ 8