PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Plan Asset) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	$ (714,608)
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	776,482	$ 714,608
DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract
Pension and other postretirement liabilities	(5,060)	(5,331)
Accrued pension and other postretirement benefit costs	(121,043)	(107,151)
Pension Plan [Member]
DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	(714,608)	(692,074)
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	94,960	65,872
Contributions made by employer	4,561	8,210
DefinedBenefitPlanContributionsByPlanParticipants	1,655	1,897
DefinedBenefitPlanBenefitsPaid	(45,384)	(41,115)
DefinedBenefitPlanSettlementsPlanAssets	(1,301)	(1,206)
DefinedBenefitPlanForeignCurrencyExchangeRateChangesPlanAssets	7,383	(11,124)
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	776,482	714,608
DefinedBenefitPlanFundedStatusOfPlan	(92,405)	(83,997)
DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract
Assets for Plan Benefits, Defined Benefit Plan	8,663	4,049
Pension and other postretirement liabilities	(3,374)	(3,498)
Accrued pension and other postretirement benefit costs	(97,694)	(84,548)
DefinedBenefitPlanAmountsRecognizedInBalanceSheet	(92,405)	(83,997)
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	201,390	198,630
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax	(1,461)	(1,580)
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	199,929	197,050
DefinedBenefitPlanAmountsThatWillBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossInNextFiscalYearAbstract
DefinedBenefitPlanAmortizationOfNetGainsLosses	15,615	11,793
DefinedBenefitPlanAmortizationOfNetPriorServiceCostCredit	(250)	(105)
DefinedBenefitPlanAccumulatedBenefitObligation	834,745	767,461
DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract
DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation	785,039	733,426
DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	752,371	702,282
DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	684,756	645,380
Assets for Plan Benefits, Defined Benefit Plan	8,663	4,049
Other Postretirement Benefits Plan [Member]
DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward
Contributions made by employer	2,654	2,250
DefinedBenefitPlanContributionsByPlanParticipants	253	266
DefinedBenefitPlanBenefitsPaid	(2,907)	(2,516)
DefinedBenefitPlanFundedStatusOfPlan	(25,035)	(24,436)
DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract
Pension and other postretirement liabilities	(1,686)	(1,833)
Accrued pension and other postretirement benefit costs	(23,349)	(22,603)
DefinedBenefitPlanAmountsRecognizedInBalanceSheet	(25,035)	(24,436)
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	(2,899)	(5,178)
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax	(2,718)	(3,373)
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	(5,617)	(8,551)
DefinedBenefitPlanAmountsThatWillBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossInNextFiscalYearAbstract
DefinedBenefitPlanAmortizationOfNetGainsLosses	(29)	(203)
DefinedBenefitPlanAmortizationOfNetPriorServiceCostCredit	$ (657)	$ (657)