NET LOSS PER SHARE - Schedule of Calculations of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Numerator:
Net loss	$ (62,504)	$ (24,222)
Denominator:
Denominator for basic net loss per share - weighted average common shares outstanding (in shares)	80,358	91,180
Dilutive common equivalent shares:
Weighted average restricted stock units (in shares)	0	0
Denominator for diluted net loss per share - weighted average shares outstanding (in shares)	80,358	91,180
Net loss per share:
Basic net loss per share (in USD per share)	$ (0.78)	$ (0.27)
Diluted net loss per share (in USD per share)	$ (0.78)	$ (0.27)