ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (288,447)	$ (216,840)	$ (216,840)
Other comprehensive income (loss) before reclassifications	8,181		(83,820)
Amounts reclassified from accumulated other comprehensive loss	1,744		12,213
Other comprehensive income, net of tax	9,925	18,033	(71,607)
Ending balance	(304,779)		(288,447)
Foreign Currency Translation Adjustments, Net [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(147,148)	(94,708)	(94,708)
Other comprehensive income (loss) before reclassifications	8,242		(52,440)
Amounts reclassified from accumulated other comprehensive loss	0		0
Other comprehensive income, net of tax	8,242		(52,440)
Ending balance	(140,224)		(147,148)
Total Pension and Postretirment Adjustments, Net [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(141,299)	$ (122,132)	(122,132)
Other comprehensive income (loss) before reclassifications	(61)		(31,380)
Amounts reclassified from accumulated other comprehensive loss	1,744		12,213
Other comprehensive income, net of tax	1,683		(19,167)
Ending balance	(164,555)		$ (141,299)
Accounting Standards Update 2018-02 [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Ending balance	(26,257)
Accounting Standards Update 2018-02 [Member] | Foreign Currency Translation Adjustments, Net [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Ending balance	(1,318)
Accounting Standards Update 2018-02 [Member] | Total Pension and Postretirment Adjustments, Net [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Ending balance	$ (24,939)