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Income tax and deferred taxes (Details 8) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Current income tax expense by foreign and domestic parties, net      
Current income tax expense $ (104,261) $ (206,382) $ (166,613)
Deferred tax expense by foreign and domestic parties, net      
Deferred tax expense (5,758) 27,407 440
Tax expense using the effective rate (110,019) (178,975) (166,173)
Foreign countries [member]      
Current income tax expense by foreign and domestic parties, net      
Current income tax expense (7,394) (7,516) (14,396)
Deferred tax expense by foreign and domestic parties, net      
Deferred tax expense 2,370 (1,885) (154)
Additional Tax Expense Relating To Transfer Pricing 1,068    
Country of domicile [member]      
Current income tax expense by foreign and domestic parties, net      
Current income tax expense (96,867) (198,866) (152,217)
Deferred tax expense by foreign and domestic parties, net      
Deferred tax expense $ (8,128) $ 29,292 $ 594