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Taxation - Tax loss carryforwards and corresponding jurisdictions (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
USD ($)
Argentina  
Disclosure Of Income Tax Jurisdiction [Line Items]  
Tax loss carry forward $ 83,872
Expiration period 5 years
Argentina | 2015  
Disclosure Of Income Tax Jurisdiction [Line Items]  
Tax loss carry forward $ 17,536
Argentina | 2016  
Disclosure Of Income Tax Jurisdiction [Line Items]  
Tax loss carry forward 1,565
Argentina | 2017  
Disclosure Of Income Tax Jurisdiction [Line Items]  
Tax loss carry forward 15,889
Argentina | 2018  
Disclosure Of Income Tax Jurisdiction [Line Items]  
Tax loss carry forward 48,882
Brazil  
Disclosure Of Income Tax Jurisdiction [Line Items]  
Tax loss carry forward 155,124
Uruguay  
Disclosure Of Income Tax Jurisdiction [Line Items]  
Tax loss carry forward $ 4,986
Expiration period 5 years
LUXEMBOURG  
Disclosure Of Income Tax Jurisdiction [Line Items]  
Tax loss carry forward $ 28,231