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CASH AND CASH EQUIVALENTS (Details 1) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Disclosure of financial assets [line items]        
Total $ 1,142,004 $ 949,327 $ 753,497 $ 989,396
Argentina, Pesos        
Disclosure of financial assets [line items]        
Total 12,135 7,871    
Brazil, Brazil Real        
Disclosure of financial assets [line items]        
Total 106,499 97,401    
Chile, Pesos        
Disclosure of financial assets [line items]        
Total 81,845 30,758    
Colombia, Pesos        
Disclosure of financial assets [line items]        
Total 7,264 4,336    
Euro Member Countries, Euro        
Disclosure of financial assets [line items]        
Total 11,746 1,695    
United States of America, Dollars        
Disclosure of financial assets [line items]        
Total 882,114 780,124    
Other currency        
Disclosure of financial assets [line items]        
Total $ 40,401 $ 27,142