EARNINGS PER SHARE ("EPS") (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Computation of Basic earnings per share:
Net income	$ 418,022	$ 588,886	$ 404,459
Weighted average common shares outstanding - basic (in shares)	115,485	114,602	113,096
Basic earnings per share (in dollars per share)	$ 3.62	$ 5.14	$ 3.58
Computation of Diluted earnings per share:
Net income	$ 418,022	$ 588,886	$ 404,459
Weighted average common shares outstanding - basic (in shares)	115,485	114,602	113,096
Add: dilutive effect of common stock equivalents (in shares)	1,290	1,142	1,040
Weighted average common shares outstanding—diluted (in shares)	116,775	115,744	114,136
Diluted earnings per share (in dollars per share)	$ 3.58	$ 5.09	$ 3.54