PENSION PLANS (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) mo plan	Jun. 30, 2014 USD ($)
Defined Benefit Plan Disclosure
Number of types of retirement plans | plan			2
Aggregate net pension expense relating to the two plan types
Service costs	$ 280	$ 393	$ 598	$ 782
Interest costs	310	388	644	773
Amortization of actuarial loss	174	19	326	38
Net pension period cost	764	$ 800	1,568	$ 1,593
Expected net pension cost for next fiscal year			3,400
Cash funding for benefits paid	$ 100		200
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