RETIREMENT PLANS - Net Periodic Pension Cost (Details) - Foreign Pension Plan - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 22	$ 0	$ 29	$ 0
Interest cost	801	0	1,068	0
Expected return on plan assets	(820)	0	(1,093)	0
Net periodic pension cost	$ 3	$ 0	$ 4	$ 0