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
	Mar. 31, 2020	Mar. 31, 2019
Cost of revenues (exclusive of depreciation and amortization)
Derivative Instruments, Gain (Loss) [Line Items]
Net loss reclassified	$ (660)	$ (452)
Accumulated other comprehensive loss
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss)/gain in fair value	$ (12,087)	$ 3,999