ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Mar. 31, 2017	Dec. 31, 2016
Stockholders' Equity Note [Abstract]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ (130,821)		$ (130,821)		$ (144,200)	$ (162,628)
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	(23,748)		(23,748)		(23,928)	(25,650)
Accumulated other comprehensive loss	(154,569)		(154,569)		$ (168,128)	$ (188,278)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	13,379		31,807
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	180	$ 465	1,902	$ 1,200
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax	$ 180		$ 1,902