ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) $ in Thousands	6 Months Ended
Jun. 30, 2017 USD ($)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ (43,403)
Other comprehensive income before reclassifications	2,800
Amounts reclassified from accumulated other comprehensive income (loss)	(275)
Net current-period other comprehensive income	2,525
Ending Balance	(40,878)
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	2,800
Amounts reclassified from accumulated other comprehensive income (loss)	0
Net current-period other comprehensive income	2,800
Ending Balance	(11,198)
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 income (loss)	(275)
Net current-period other comprehensive income	(275)
Ending Balance	$ (29,680)

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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