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Financial risk management - Analysis of Borrowings after Interest Rate Swaps (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic $ (916,525) $ (847,201)  
Total debt 817,651 971,090 $ 968,280
Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Total debt 817,651 971,090  
Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 626,807 717,641  
Floating interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 190,844 253,449  
Argentine Peso      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic (33,002) (115,385)  
Argentine Peso | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 11,769 81,283  
Brazilian Reais      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic (396,288) (298,039)  
Brazilian Reais | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 10,887 22,834  
Brazilian Reais | Floating interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 169,597 184,123  
U.S. Dollar      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic (485,398) (433,122)  
U.S. Dollar | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 604,151 613,524  
U.S. Dollar | Floating interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 21,247 69,326  
Argentine Peso      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic (300,450) (308,450)  
Argentine Peso | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Total debt 128,018 178,538  
Argentine Peso | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 108,225 111,954  
Argentine Peso | Floating interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 19,793 66,584  
Argentine Peso | Argentine Peso      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic (33,002) (115,097)  
Argentine Peso | Argentine Peso | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 11,769 81,283  
Argentine Peso | Brazilian Reais | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 0 0  
Argentine Peso | Brazilian Reais | Floating interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 0 0  
Argentine Peso | U.S. Dollar      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic (267,448) (193,353)  
Argentine Peso | U.S. Dollar | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 96,456 30,671  
Argentine Peso | U.S. Dollar | Floating interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 19,793 66,584  
Brazilian Reais      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic (666,501) (605,650)  
Brazilian Reais | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Total debt 524,460 632,985  
Brazilian Reais | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 353,409 446,120  
Brazilian Reais | Floating interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 171,051 186,865  
Brazilian Reais | Argentine Peso | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 0 0  
Brazilian Reais | Brazilian Reais      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic (396,288) (298,039)  
Brazilian Reais | Brazilian Reais | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 10,887 22,834  
Brazilian Reais | Brazilian Reais | Floating interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 169,597 184,123  
Brazilian Reais | U.S. Dollar      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic (270,213) (307,611)  
Brazilian Reais | U.S. Dollar | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 342,522 423,286  
Brazilian Reais | U.S. Dollar | Floating interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 1,454 2,742  
Uruguayan Peso      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 19,936 20,065  
Uruguayan Peso | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Total debt 0 2,002  
Uruguayan Peso | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 0 2,002  
Uruguayan Peso | Floating interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 0 0  
Uruguayan Peso | Argentine Peso | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 0 0  
Uruguayan Peso | Brazilian Reais | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 0 0  
Uruguayan Peso | Brazilian Reais | Floating interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 0 0  
Uruguayan Peso | U.S. Dollar      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 21,773 20,720  
Uruguayan Peso | U.S. Dollar | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 0 2,002  
Uruguayan Peso | U.S. Dollar | Floating interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 0 0  
U.S. Dollar      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 30,490 46,834  
U.S. Dollar | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Total debt 165,173 157,565  
U.S. Dollar | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 165,173 157,565  
U.S. Dollar | Floating interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 0 0  
U.S. Dollar | Argentine Peso      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 0 (288)  
U.S. Dollar | Argentine Peso | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 0 0  
U.S. Dollar | Brazilian Reais | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 0 0  
U.S. Dollar | Brazilian Reais | Floating interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 0 0  
U.S. Dollar | U.S. Dollar      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 30,490 47,122  
U.S. Dollar | U.S. Dollar | Fixed interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic 165,173 157,565  
U.S. Dollar | U.S. Dollar | Floating interest rate | Interest rate risk      
Disclosure of detailed information about financial instruments [line items]      
Risk exposure associated with instruments sharing characteristic $ 0 $ 0