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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Fair Value of Derivative Instruments in the Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value of Derivative Instruments
Derivative Assets	$ 2,758	$ 259
Derivative Liabilities	401	1,371
Cash delivered on foreign currency forward contract			$ 66,155
Foreign Exchange Contract, Amount of Gain (Loss) Recognized in Income on Derivative, not designated as hedging instruments	(141)	652
Foreign Exchange Contracts
Fair Value of Derivative Instruments
Aggregate amount of forward exchange contracts	51,500
Foreign Exchange Contract, Amount of Gain (Loss) Recognized in Income on Derivative, not designated as hedging instruments	(141)	652
Derivative Contracts Not Designated as Hedging Instruments
Fair Value of Derivative Instruments
Derivative Assets	206	259
Derivative Liabilities	401	331
Derivative Contracts Not Designated as Hedging Instruments \| Foreign Exchange Contracts \| Prepaid and other
Fair Value of Derivative Instruments
Derivative Assets	206	259
Derivative Contracts Not Designated as Hedging Instruments \| Foreign Exchange Contracts \| Accounts payable and accrued liabilities
Fair Value of Derivative Instruments
Derivative Liabilities	401	331
Derivative Contracts Designated as Hedging Instruments
Fair Value of Derivative Instruments
Derivative Assets	2,552
Derivative Liabilities		1,040
Derivative Contracts Designated as Hedging Instruments \| Cross Currency Swap Contract \| Prepaid and other
Fair Value of Derivative Instruments
Derivative Assets	$ 2,552
Derivative Contracts Designated as Hedging Instruments \| Cross Currency Swap Contract \| Accounts payable and accrued liabilities
Fair Value of Derivative Instruments
Derivative Liabilities		$ 1,040