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Provisions and other non-financial liabilities (Details 2) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Disclosure of other provisions [abstract]    
Tax withholdings $ 1,208 $ 3,345
VAT payable 1,642 3,465
Guarantees received 2,636 2,641
Accrual for dividend 8,027 68,890
Monthly tax provisional payments 8,407 16,659
Deferred income 6,435 3,033
Withholdings from employees and salaries payable 5,017 4,575
Accrued vacations 24,003 21,686
Other current liabilities 3,580 2,605
Total $ 60,955 $ 126,899