DERIVATIVE FINANCIAL INSTRUMENTS (Changes in the Fair Value of Derivative Instruments) (Details) - Foreign exchange contracts - Designated as hedging instruments - Cash flow hedging - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Cost of revenues (exclusive of depreciation and amortization)
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss)/gain reclassified	$ (1,851)	$ 342	$ (2,511)	$ (110)
Accumulated other comprehensive loss
Derivative Instruments, Gain (Loss) [Line Items]
Net gain/(loss) in fair value	$ 8,317	$ 1,984	$ (3,770)	$ 5,983