NET INCOME (LOSS) PER SHARE - Schedule of Calculations of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Net income (loss)	$ 19,352	$ (2,754)	$ (73,324)
Denominator:
Denominator for basic net income (loss) per share - weighted average common shares outstanding (in shares)	73,103	75,162	78,617
Dilutive common equivalent shares:
Weighted average restricted stock units (in shares)	719	0	0
Denominator for diluted net income (loss) per share - weighted average shares outstanding (in shares)	73,822	75,162	78,617
Net income (loss) per share:
Basic net income (loss) per share (in dollars per share)	$ 0.26	$ (0.04)	$ (0.93)
Diluted net income (loss) per share (in dollars per share)	$ 0.26	$ (0.04)	$ (0.93)