PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
DefinedBenefitPlanChangeInBenefitObligationRollForward
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement	$ 0	$ (2,228)
Pension Plan [Member]
DefinedBenefitPlanChangeInBenefitObligationRollForward
Defined Benefit Plan, Benefit Obligation, Beginning Balance	814,894	868,887
Service cost	23,664	27,116	$ 25,093
Interest cost	29,019	26,149	25,895
DefinedBenefitPlanContributionsByPlanParticipants	1,276	1,402
DefinedBenefitPlanActuarialGainLoss	(118,893)	58,913
DefinedBenefitPlanBenefitsPaid	(43,736)	(41,962)
Defined Benefit Plan, Actual Expense	(1,846)	(1,371)
DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	3,023	(4,186)
Defined Benefit Plan, Benefit Obligation, Ending Balance	945,187	814,894	868,887
Other Postretirement Benefits Plan [Member]
DefinedBenefitPlanChangeInBenefitObligationRollForward
Defined Benefit Plan, Benefit Obligation, Beginning Balance	22,060	25,035
Service cost	432	490	435
Interest cost	796	719	762
DefinedBenefitPlanContributionsByPlanParticipants	346	319
DefinedBenefitPlanActuarialGainLoss	(2,124)	1,982
DefinedBenefitPlanBenefitsPaid	(2,192)	(2,521)
Defined Benefit Plan, Benefit Obligation, Ending Balance	$ 23,566	$ 22,060	$ 25,035