EARNINGS PER SHARE ("EPS") (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Computation of Basic earnings per share:
Net income	$ 88,505	$ 46,280
Weighted average shares outstanding—basic (in shares)	113,862	112,621
Basic earnings per share (in dollars per share)	$ 0.78	$ 0.41
Computation of Diluted earnings per share:
Net income	$ 88,505	$ 46,280
Weighted average shares outstanding—basic (in shares)	113,862	112,621
Add: dilutive effect of common stock equivalents (in shares)	1,094	1,107
Weighted average common shares outstanding—diluted (in shares)	114,956	113,728
Diluted earnings per share (in dollars per share)	$ 0.77	$ 0.41