FINANCIAL INSTRUMENTS - Foreign Currency Risk Management (Details) - Foreign currency contracts - USD ($) $ in Thousands	Dec. 31, 2019	Mar. 31, 2019
Other current assets | Derivatives designated as hedging instruments
Fair Values of Derivative Instruments
Asset Derivatives	$ 9,113	$ 10,503
Other current assets | Derivatives not designated as hedging instruments
Fair Values of Derivative Instruments
Asset Derivatives	27,147	16,774
Other assets | Derivatives designated as hedging instruments
Fair Values of Derivative Instruments
Asset Derivatives	9,782	0
Other current liabilities | Derivatives designated as hedging instruments
Fair Values of Derivative Instruments
Liability Derivatives	10,284	10,282
Other current liabilities | Derivatives not designated as hedging instruments
Fair Values of Derivative Instruments
Liability Derivatives	21,347	17,144
Other liabilities | Derivatives designated as hedging instruments
Fair Values of Derivative Instruments
Liability Derivatives	$ 0	$ 0