Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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The cash outflow for a financial contract that meets the hedge criteria as either a cash flow hedge, fair value hedge, or hedge of a net investment in a foreign operation.

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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Fair Value of Derivative Instruments in the Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Fair Value of Derivative Instruments
Derivative Assets	$ 262		$ 262		$ 663
Derivative Liabilities	5,593		5,593		17,913
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	(1,011)	$ (15,534)	102	(64,651)
Foreign Exchange Contracts
Fair Value of Derivative Instruments
Aggregate amount of forward exchange contracts outstanding	103,900		103,900
Foreign Exchange Contract, Amount of Gain (Loss) Recognized in Income on Derivative, not designated as hedging instruments	(1,011)	$ (15,534)	102	$ (64,651)
Derivative Contracts Not Designated as Hedging Instruments
Fair Value of Derivative Instruments
Derivative Assets	262		262		663
Derivative Liabilities	881		881		1,604
Derivative Contracts Not Designated as Hedging Instruments \| Foreign Exchange Contracts \| Prepayments and other
Fair Value of Derivative Instruments
Derivative Assets	262		262		663
Derivative Contracts Not Designated as Hedging Instruments \| Foreign Exchange Contracts \| Accounts payable and accrued liabilities
Fair Value of Derivative Instruments
Derivative Liabilities	881		881		1,604
Derivative Contracts Designated as Hedging Instruments
Fair Value of Derivative Instruments
Derivative Liabilities	4,712		4,712		16,309
Derivative Contracts Designated as Hedging Instruments \| Cross Currency Swap Contract \| Accounts payable and accrued liabilities
Fair Value of Derivative Instruments
Derivative Liabilities	$ 4,712		$ 4,712		$ 16,309