LABOR COSTS (Included Cost of sales and Selling, General and Administrative expenses) (Details) $ in Thousands	12 Months Ended
Dec. 31, 2017 USD ($) employee	Dec. 31, 2016 USD ($) employee	Dec. 31, 2015 USD ($) employee
Labor Costs [Abstract]
Wages, salaries and social security costs	$ 849,354	$ 698,825	$ 754,063
Termination benefits	25,783	27,048	30,888
Total expense	28,213	27,758	29,390
Labor costs	$ 903,350	$ 753,631	$ 814,341
Number of employees \| employee	21,335	16,725	16,739

The expense of all forms of consideration given by an entity in exchange for a service rendered by employees or for the termination of employment.

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The number of personnel employed by the entity at a date.

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The amount of post-employment benefit expense relating to defined benefit plans. [Refer: Defined benefit plans [member]]

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The amount of expense from employee benefits (other than termination benefits) that are expected to be settled wholly within twelve months after the end of the annual reporting period in which the employees render the related services.

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The amount of expense in relation to termination benefits. Termination benefits are employee benefits provided in exchange for the termination of an employee's employment as a result of either: (a) an entity's decision to terminate an employee's employment before the normal retirement date; or (b) an employee's decision to accept an offer of benefits in exchange for the termination of employment. [Refer: Employee benefits expense]

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Labor Costs [Abstract]

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