DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES (Balance Sheet Location) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	$ 903	$ 24,206
Fair value, derivative liability	(21,868)	(2,089)
Other current assets
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	15	369
Other assets
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	888	23,837
Other current liabilities
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	(3,469)	(2,021)
Other non-current liabilities
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	(18,399)	(68)
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 exchange contracts \| Other current liabilities
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	(3,288)	(1,569)
Designated as Hedging Instrument \| Derivatives designated as cash flow hedges: \| Foreign currency exchange contracts \| Other non-current liabilities
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	(253)	0
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: \| Foreign currency option contracts \| Other current assets
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	15	217
Designated as Hedging Instrument \| Derivatives designated as cash flow hedges: \| Foreign currency option contracts \| Other assets
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	138	102
Designated as Hedging Instrument \| Derivatives designated as cash flow hedges: \| Foreign currency option contracts \| Other current liabilities
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	(179)	(106)
Designated as Hedging Instrument \| Derivatives designated as cash flow hedges: \| Foreign currency option contracts \| Other non-current liabilities
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	(159)	(68)
Designated as Hedging Instrument \| Derivatives designated as cash flow hedges: \| Interest rate swaps
Derivatives, Fair Value [Line Items]
Notional Amount	650,000	650,000
Designated as Hedging Instrument \| Derivatives designated as cash flow hedges: \| Interest rate swaps \| Other assets
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	750	23,735
Designated as Hedging Instrument \| Derivatives designated as cash flow hedges: \| Interest rate swaps \| Other non-current liabilities
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	(17,987)	0
Derivative not designated as a hedging instrument: \| Foreign currency exchange contracts
Derivatives, Fair Value [Line Items]
Notional Amount	0	9,396
Derivative not designated as a hedging instrument: \| Foreign currency exchange contracts \| Other current assets
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	0	152
Derivative not designated as a hedging instrument: \| Foreign currency exchange contracts \| Other current liabilities
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	0	(24)
Derivative not designated as a hedging instrument: \| Carbon options
Derivatives, Fair Value [Line Items]
Notional Amount	3,115	2,517
Derivative not designated as a hedging instrument: \| Carbon options \| Other current liabilities
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	$ (2)	$ (322)

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