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LABOR COSTS (Included Cost of sales and Selling, General and Administrative expenses) (Tables)
 12 Months Ended
Dec. 31, 2017
Labor Costs [Abstract]  
Schedule of labor costs
 
Year ended December 31,
 
2017
 
2016
 
2015
 
 
 
 
 
 
Wages, salaries and social security costs
849,354

 
698,825

 
754,063

Termination benefits
25,783

 
27,048

 
30,888

Post-employment benefits (Note 21 (i))
28,213

 
27,758

 
29,390

 
 
 
 
 
 
Labor costs
903,350

 
753,631

 
814,341