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Trade and other receivables, net - Carrying Amounts (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Disclosure of financial assets [line items]    
Trade and other receivables $ 172,331 $ 197,506
US Dollar    
Disclosure of financial assets [line items]    
Trade and other receivables 37,131 52,342
Argentine Peso    
Disclosure of financial assets [line items]    
Trade and other receivables 45,520 42,896
Uruguay, Pesos    
Disclosure of financial assets [line items]    
Trade and other receivables 999 534
Brazilian Reais    
Disclosure of financial assets [line items]    
Trade and other receivables $ 88,681 $ 101,734