PENSION PLANS (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) mo plan	Sep. 30, 2014 USD ($)
Defined Benefit Plan Disclosure
Number of types of retirement plans | plan			2
Aggregate net pension expense relating to the two plan types
Service costs	$ 282	$ 383	$ 880	$ 1,165
Interest costs	310	378	954	1,151
Amortization of actuarial loss	175	18	501	56
Net pension period cost	767	$ 779	2,335	$ 2,372
Expected net pension cost for next fiscal year			3,400
Cash funding for benefits paid	$ 100		300
Expected cash funding for benefits to be paid next year			$ 500
Minimum
Defined Benefit Plan Disclosure
Period of salary paid to Company's French employees as termination benefits at retirement, range (in months) | mo			1
Maximum
Defined Benefit Plan Disclosure
Period of salary paid to Company's French employees as termination benefits at retirement, range (in months) | mo			5