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Derivative Instruments and Hedging Activities Fair Value (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Derivatives, Fair Value [Line Items]    
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value $ 54,765 $ 44,637
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value $ (41,935) $ (36,102)