EARNINGS (LOSS) PER SHARE ("EPS") (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Computation of Basic earnings (loss) per share:
Net income (loss)	$ 25,367	$ (2,736)	$ 97,060	$ 57,540	[1]
Less: net income allocated to participating securities	0	0	0	(487)
Net income (loss) for basic earnings per share calculation	$ 25,367	$ (2,736)	$ 97,060	$ 57,053
Total weighted average shares outstanding—basic (in shares)	113,735	109,430	113,339	107,232
Less: weighted average participating shares outstanding (in shares)	0	0	0	(908)
Weighted average common shares outstanding—basic (in shares)	113,735	109,430	113,339	106,324
Basic earnings (loss) per share (in dollars per share)	$ 0.22	$ (0.03)	$ 0.86	$ 0.54
Earnings Per Share, Diluted [Abstract]
Net income (loss)	$ 25,367	$ (2,736)	$ 97,060	$ 57,540	[1]
Less: net income allocated to participating securities	0	0	0	(478)
Net income (loss) for diluted earnings (loss) per share calculation	$ 25,367	$ (2,736)	$ 97,060	$ 57,062
Weighted average common shares outstanding—basic (in shares)	113,735	109,430	113,339	106,324
Add: dilutive effect of common stock equivalents (in shares)	2,360	0	2,462	3,032
Weighted average common shares outstanding—diluted (in shares)	116,095	109,430	115,801	109,356
Less: weighted average participating shares outstanding (in shares)	0	0	0	(908)
Weighted average common shares outstanding- diluted (in shares)	116,095	109,430	115,801	108,448
Diluted earnings (loss) per share (in dollars per share)	$ 0.22	$ (0.03)	$ 0.84	$ 0.53

[1] Prior period amounts have been adjusted retrospectively to reflect the adoption of ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. Refer to Note 1 for further discussion.