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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

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- Definition Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets still held. + 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)(A) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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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 + Details
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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 + Details
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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 + Details
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