ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ (43,403)
Other comprehensive income before reclassifications	8,676
Amounts reclassified from accumulated other comprehensive loss	(414)
Net of tax	8,262
Ending Balance	(35,141)
Foreign Currency Translation Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(13,998)
Other comprehensive income before reclassifications	8,676
Amounts reclassified from accumulated other comprehensive loss	0
Net of tax	8,676
Ending Balance	(5,322)
Pension and Other Post-Employment Liability Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(29,405)
Other comprehensive income before reclassifications	0
Amounts reclassified from accumulated other comprehensive loss	(414)
Net of tax	(414)
Ending Balance	$ (29,819)