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DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES (Notional Amounts) (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
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Designated as Hedging Instrument | Derivatives designated as cash flow hedges: | Foreign currency exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | $ 60,750 | $ 69,950
Designated as Hedging Instrument | Derivatives designated as cash flow hedges: | Foreign currency option contracts |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 28,000 | 24,000
Designated as Hedging Instrument | Derivatives designated as cash flow hedges: | Interest rate swaps |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 650,000 | 650,000
Derivatives not designated as hedging instruments: | Foreign currency exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 0 | 9,396
Derivatives not designated as hedging instruments: | Carbon options |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | $ 3,115 | $ 2,517

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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 + Details
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