PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Plan Asset) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	$ 738,296
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	835,139	$ 738,296
DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract
Pension and other postretirement liabilities	(6,690)	(6,528)
Accrued pension and other postretirement benefit costs	(138,635)	(101,227)
Pension Plan [Member]
DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance	738,296	776,482
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	133,896	(44,876)
Contributions made by employer	3,867	55,311
DefinedBenefitPlanContributionsByPlanParticipants	1,276	1,402
DefinedBenefitPlanBenefitsPaid	(43,736)	(44,190)
DefinedBenefitPlanSettlementsPlanAssets	(1,846)	(1,371)
DefinedBenefitPlanForeignCurrencyExchangeRateChangesPlanAssets	3,386	(4,462)
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	835,139	738,296
DefinedBenefitPlanFundedStatusOfPlan	(110,048)	(76,598)
DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract
Pension asset	11,711	9,098
Pension and other postretirement liabilities	(5,143)	(4,905)
Accrued pension and other postretirement benefit costs	(116,616)	(80,791)
DefinedBenefitPlanAmountsRecognizedInBalanceSheet	(110,048)	(76,598)
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	263,660	228,430
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax	(934)	(1,225)
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	262,726	227,205
DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract
DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation	881,731	743,632
DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	848,309	714,146
DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	759,972	658,327
Other Postretirement Benefits Plan [Member]
DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward
Contributions made by employer	1,846	2,203
DefinedBenefitPlanContributionsByPlanParticipants	346	319
DefinedBenefitPlanBenefitsPaid	(2,192)	(2,522)
DefinedBenefitPlanFundedStatusOfPlan	(23,566)	(22,060)
DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract
Pension and other postretirement liabilities	(1,547)	(1,623)
Accrued pension and other postretirement benefit costs	(22,019)	(20,437)
DefinedBenefitPlanAmountsRecognizedInBalanceSheet	(23,566)	(22,060)
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	(2,429)	(4,751)
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax	(1,404)	(2,060)
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	$ (3,833)	$ (6,811)