DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES (Notional Amounts) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
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