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Derivative Instruments and Hedging Activities (Details) - Foreign Exchange Contracts [Member] - Not Designated as Hedging Instrument [Member] - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Prepaid Expenses and Other Current Assets [Member]    
Derivatives, Fair Value [Line Items]    
Foreign currency exchange contracts $ 36,488 $ 80,879
Accrued expenses and other current liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Foreign currency derivative instruments, liability at fair value $ (26,224) $ (65,905)