ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			$ (216,840)	$ (291,756)	$ (291,756)
Other comprehensive income (loss) before reclassifications			(30,426)		67,111
Amounts reclassified from accumulated other comprehensive loss			8,978		7,805
Other comprehensive income (loss), net of tax	$ 1,228	$ 26,673	(21,448)	74,268	74,916
Ending balance	(238,288)		(238,288)		(216,840)
Foreign Currency Translation Adjustments, Net [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			(94,708)	(172,650)	(172,650)
Other comprehensive income (loss) before reclassifications			(30,590)		77,942
Amounts reclassified from accumulated other comprehensive loss			0		0
Other comprehensive income (loss), net of tax			(30,590)		77,942
Ending balance	(125,298)		(125,298)		(94,708)
Total Pension and Postretirment Adjustments, Net [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			(122,132)	$ (119,106)	(119,106)
Other comprehensive income (loss) before reclassifications			164		(10,831)
Amounts reclassified from accumulated other comprehensive loss			8,978		7,805
Other comprehensive income (loss), net of tax			9,142		(3,026)
Ending balance	$ (112,990)		$ (112,990)		$ (122,132)