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Summary of significant accounting policies - Restatement of financial results (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of financial instruments by type of interest rate [line items]      
Interest income $ (4,084) $ (6,390) $ (7,728)
Finance income (26,054) (8,979) [1] (8,394) [1]
Interest expense (58,282) (56,468) (47,266)
Cash flow hedge - transfer from equity 90,689 76,303 [2]  
Foreign exchange losses, net (109,266) (25,779) (68,787)
Finance costs 213,776 126,111 [1] 163,937 [1]
Other financial results - Net gain of inflation effects on the monetary items 12,064 16,911 [1],[3] (25,211) [1],[3]
Total financial results, net $ (175,658) (100,221) [1] (180,754) [1]
Previously stated      
Disclosure of financial instruments by type of interest rate [line items]      
Interest income   (7,319) (7,915)
Finance income   (9,908) (8,581)
Interest expense   (60,134) (51,577)
Foreign exchange losses, net   (108,458) (183,195)
Finance costs   202,566 271,263
Other financial results - Net gain of inflation effects on the monetary items   92,437 81,928
Total financial results, net   (100,221) (180,754)
Increase / (Decrease)      
Disclosure of financial instruments by type of interest rate [line items]      
Interest income   (929) (187)
Finance income   (929) (187)
Interest expense   (3,666) (4,311)
Foreign exchange losses, net   82,679 114,408
Finance costs   (76,455) (107,326)
Other financial results - Net gain of inflation effects on the monetary items   (75,526) (107,139)
Total financial results, net   $ 0 $ 0
[1] Prior periods have been recast to reflect the Company's change in accounting policy for the reclassification within financial results as explained in Note 34.1.
[2] Prior periods have been recast to reflect the Company's change in accounting policy for the reclassification within shareholders equity of the initial application of IAS 29 as explained in Note 34.1.
[3] Prior periods have been recast to reflect the Company's change in accounting policy for the reclassification within financial results as explained in Note 34.1