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INCOME TAX EXPENSE (Income tax expense) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Major components of tax expense (income) [Line Items]      
Current tax $ (588,773) $ (450,384) $ (394,045)
Effect of changes in tax law (28,596) 0 0
Deferred tax 232,485 106,047 (16,821)
Effect of changes in tax law 0 7,455 2,028
Withholding tax on dividend distributions 0 0 (2,690)
Recovery of income tax 15,449 0 0
Income tax expense (369,435) (336,882) $ (411,528)
Argentina      
Major components of tax expense (income) [Line Items]      
Effect of changes in tax law $ (28,600)    
Withholding tax rate 10.00%    
United States      
Major components of tax expense (income) [Line Items]      
Deferred income tax benefit   $ 5,200