ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Stockholders' Equity Note [Abstract]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ (176,290)	$ (176,290)	$ (181,075)	$ (175,794)
Currency translation adjustments	4,785	(496)
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	(31,706)	(31,706)	(32,244)	(27,777)
Amortization of unrecognized losses and prior service cost, net of tax of $4	538	1,004
Reclassification from AOCI to retained earnings-Adoption of ASU 2018-02		(4,933)
Accumulated other comprehensive loss	$ (207,996)	$ (207,996)	$ (213,319)	$ (203,571)

Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

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