EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
401(k) Plan [Member]
Employee Benefit Plans [Abstract]
Contributions to the plan	$ 1.6	$ 1.9	$ 2.3
Foreign Plan [Member]
Employee Benefit Plans [Abstract]
Contributions to international employees retirement and post-employment plans	$ 1.8	$ 2.0	$ 2.2