NET INCOME (LOSS) PER SHARE - Schedule of Calculations of Basic and Diluted Net Income (Loss) Per Share and Potential Common Shares (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Numerator:
Net income (loss)	$ 21,245	$ (24,507)	$ 10,981	$ (24,753)
Denominator:
Denominator for basic net income (loss) per share - weighted average common shares outstanding (in shares)	91,762	98,797	92,337	77,126
Dilutive common equivalent shares:
Weighted average restricted stock units (in shares)	640	0	660	0
Denominator for diluted net income per share - weighted average shares outstanding (in shares)	92,402	98,797	92,997	77,126
Net income (loss) per share:
Basic net income (loss) per share (in USD per share)	$ 0.23	$ (0.25)	$ 0.12	$ (0.32)
Diluted net income (loss) per share (in USD per share)	$ 0.23	$ (0.25)	$ 0.12	$ (0.32)