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DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES (Notional Amounts) (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Designated as Hedging Instrument | Cash Flow Hedging | Foreign currency exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | $ 77,500 | $ 69,950
Designated as Hedging Instrument | Cash Flow Hedging | Foreign currency option contracts |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 24,000 | 24,000
Designated as Hedging Instrument | Cash Flow Hedging | Interest rate swaps |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 650,000 | 650,000
Not Designated as Hedging Instrument | Foreign currency exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 4,082 | 9,396
Not Designated as Hedging Instrument | Carbon option |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | $ 6,995 | $ 2,517

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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