PENSION (Plan Assets) (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems
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
FairValueInputsLevel3Member
FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	(12,378)	(10,475)
DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld	226	183
DefinedBenefitPlanPurchasesSalesAndSettlements	(68)	1,966
DefinedBenefitPlanForeignCurrencyExchangeRateChangesPlanAssets	567	(246)
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	13,103	12,378
Insurance Contracts [Member] \| FairValueInputsLevel3Member
FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	(10,760)	(9,720)
DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld	167	148
DefinedBenefitPlanPurchasesSalesAndSettlements	(503)	1,095
DefinedBenefitPlanForeignCurrencyExchangeRateChangesPlanAssets	488	(203)
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	10,912	10,760
Other Assets [Member]
FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	(1,618)
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	2,191	1,618
Other Assets [Member] \| FairValueInputsLevel3Member
FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	(1,618)	(755)
DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld	58	35
DefinedBenefitPlanPurchasesSalesAndSettlements	436	871
DefinedBenefitPlanForeignCurrencyExchangeRateChangesPlanAssets	79	(43)
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	$ 2,191	$ 1,618

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets still held.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(5)(iv)(02)(A)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Definition

Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) plan assets of defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Definition

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from purchases, sales and settlements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(5)(iv)(02)(B)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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