PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Pension Plan [Member]
DefinedBenefitPlanChangeInBenefitObligationRollForward
Defined Benefit Plan, Benefit Obligation, Beginning Balance	$ 798,605	$ 774,710
Service cost	25,093	25,100	$ 26,873
Interest cost	25,895	30,495	30,050
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(53,552)	(54,101)	(54,629)
Prior service cost	(100)	(46)	618
Defined Benefit Plan, Amortization of Gain (Loss)	12,925	12,029	16,890
Curtailment charge	327		7,461
DefinedBenefitPlanContributionsByPlanParticipants	1,655	1,897
DefinedBenefitPlanPlanAmendments		0
DefinedBenefitPlanActuarialGainLoss	(56,727)	(19,640)
DefinedBenefitPlanBenefitsPaid	(45,384)	(41,115)
Defined Benefit Plan, Actual Expense	(1,301)	(1,206)
DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	7,597	(10,916)
Defined Benefit Plan, Benefit Obligation, Ending Balance	868,887	798,605	774,710
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	10,588	13,477	27,263
Other Postretirement Benefits Plan [Member]
DefinedBenefitPlanChangeInBenefitObligationRollForward
Defined Benefit Plan, Benefit Obligation, Beginning Balance	24,436	21,980
Service cost	435	338	286
Interest cost	762	996	842
Prior service cost	(656)	(657)	(657)
Defined Benefit Plan, Amortization of Gain (Loss)	(223)	(296)	(551)
DefinedBenefitPlanContributionsByPlanParticipants	253	266
DefinedBenefitPlanActuarialGainLoss	(2,056)	(3,372)
DefinedBenefitPlanBenefitsPaid	(2,907)	(2,516)
Defined Benefit Plan, Benefit Obligation, Ending Balance	25,035	24,436	21,980
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 318	$ 381	$ (80)