EARNINGS PER SHARE ("EPS") (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Computation of Basic earnings per share:
Net income	$ 179,948	$ 25,140	$ 277,007	$ 82,680	[1]
Less: net income allocated to participating securities	0	(62)	0	(211)
Net income for basic earnings per share calculation	$ 179,948	$ 25,078	$ 277,007	$ 82,469
Total weighted average shares outstanding—basic (in shares)	113,433	113,991	113,390	109,010
Less: weighted average participating shares outstanding (in shares)	0	(279)	0	(278)
Weighted average common shares outstanding—basic (in shares)	113,433	113,712	113,390	108,732
Basic earnings per share (in dollars per share)	$ 1.59	$ 0.22	$ 2.44	$ 0.76
Computation of Diluted earnings per share:
Net income	$ 179,948	$ 25,140	$ 277,007	$ 82,680	[1]
Less: net income allocated to participating securities	0	(59)	0	(206)
Net income (loss) for diluted earnings (loss) per share calculation	$ 179,948	$ 25,081	$ 277,007	$ 82,474
Weighted average common shares outstanding—basic (in shares)	113,433	113,712	113,390	108,732
Add: dilutive effect of common stock equivalents (in shares)	1,304	4,206	1,528	2,708
Weighted average common shares outstanding—diluted (in shares)	114,737	117,918	114,918	111,440
Less: weighted average participating shares outstanding (in shares)	0	(279)	0	(278)
Weighted average common shares outstanding- diluted (in shares)	114,737	117,639	114,918	111,162
Diluted earnings per share (in dollars per share)	$ 1.57	$ 0.21	$ 2.41	$ 0.74

[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.