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Financial Instruments Risks - Forward Transactions and Foreign Currency Forward (Details)
€ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2020
USD ($)
Dec. 31, 2020
EUR (€)
Dec. 31, 2019
USD ($)
Dec. 31, 2019
EUR (€)
Foreign Currency Forward Transactions [Abstract]        
Foreign currency forward purchases—US$ | $ $ 1,011,403   $ 618,497  
Foreign currency forward sales—US$ | $ 978,794   620,956  
Foreign currency forward sales—Euros | €   € 6,834   € 1,804
Foreign currency forward purchases—Euros | €       35
Foreign currency forward - US$ | $ $ 32,609   $ (2,459)  
Foreign currency forward - Euros | €   € 6,834   € 1,769