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DEFERRED INCOME TAX (Changes in deferred tax assets and liabilities) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax liability, beginning balance $ (346,485)    
Deferred tax assets, beginning balance 158,703    
Translation differences (69) $ (36)  
Deferred tax (charge) credit 185,655 39,894  
Credits directly to other comprehensive income (14,158) 12,100  
Effect of changes in tax law (9,117) 0 $ 16,979
Deferred tax liability, ending balance (186,216) (346,485)  
Deferred tax assets, ending balance 160,745 158,703  
Deferred tax assets recognized on unused tax losses 3,578 31,084  
Unused tax credits for which no deferred tax asset recognised 100,000 200,000  
Unused tax losses for which no deferred tax asset recognised 800,000 1,000,000  
Deferred tax liabilities      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax liability, beginning balance (479,058) (519,134)  
Translation differences   46  
Deferred tax (charge) credit 137,793 40,030  
Deferred tax liability, ending balance (341,265) (479,058) (519,134)
PP&E      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax liability, beginning balance (426,140) (437,376)  
Translation differences   46  
Deferred tax (charge) credit 72,720 11,190  
Deferred tax liability, ending balance (353,420) (426,140) (437,376)
Inventories      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax liability, beginning balance (30,187) (63,460)  
Translation differences   0  
Deferred tax (charge) credit 79,624 33,273  
Deferred tax liability, ending balance   (30,187) (63,460)
Deferred tax assets, ending balance 49,437    
Intangible assets      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax liability, beginning balance (20,710) (17,109)  
Translation differences   0  
Deferred tax (charge) credit (5,613) (3,601)  
Deferred tax liability, ending balance (26,323) (20,710) (17,109)
Other      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax liability, beginning balance (2,021) (1,189)  
Translation differences   0  
Deferred tax (charge) credit (8,938) (832)  
Deferred tax liability, ending balance (10,959) (2,021) (1,189)
Deferred tax assets      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets, beginning balance 291,276 279,394  
Translation differences (69) (82)  
Deferred tax (charge) credit 47,862 (136)  
Credits directly to other comprehensive income (14,158) 12,100  
Effect of changes in tax law (9,117)    
Deferred tax assets, ending balance 315,794 291,276 279,394
Provisions      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets, beginning balance 52,342 45,654  
Translation differences 0 0  
Deferred tax (charge) credit 29,797 6,688  
Credits directly to other comprehensive income 0 0  
Effect of changes in tax law 0    
Deferred tax assets, ending balance 82,139 52,342 45,654
Trade receivables      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets, beginning balance 9,186 10,200  
Translation differences 0 0  
Deferred tax (charge) credit 25,958 (1,014)  
Credits directly to other comprehensive income 0 0  
Effect of changes in tax law 0    
Deferred tax assets, ending balance 35,144 9,186 10,200
Tax losses      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets, beginning balance 31,084 42,766  
Translation differences 0 0  
Deferred tax (charge) credit (27,506) (11,682)  
Credits directly to other comprehensive income 0 0  
Effect of changes in tax law 0    
Deferred tax assets, ending balance 3,578 31,084 42,766
Other      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets, beginning balance 198,664 180,774  
Translation differences (69) (82)  
Deferred tax (charge) credit 19,613 5,872  
Credits directly to other comprehensive income (14,158) 12,100  
Effect of changes in tax law (9,117)    
Deferred tax assets, ending balance $ 194,933 $ 198,664 $ 180,774