Financial Instruments - Financial Liabilities (Details) - Fair value - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trade payables	$ 293,480	$ 390,277
Other taxes	45,998	50,099
Employee-related payables	68,709	74,781
Other current liabilities	43,299	35,886
Financial liabilities	167,077	4,405
Total	$ 618,563	$ 555,448