EARNINGS PER SHARE ("EPS") - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Computation of Basic earnings per share:
Net income	$ 182,248	$ 163,642	$ 370,074	$ 281,737
Weighted average shares outstanding—basic (in shares)	115,004	113,251	114,436	112,996
Basic earnings per share (in dollars per share)	$ 1.58	$ 1.44	$ 3.23	$ 2.49
Computation of Diluted earnings per share:
Net income	$ 182,248	$ 163,642	$ 370,074	$ 281,737
Weighted average shares outstanding—basic (in shares)	115,004	113,251	114,436	112,996
Add: dilutive effect of common stock equivalents (in shares)	1,113	1,003	1,137	1,013
Weighted average common shares outstanding—diluted (in shares)	116,117	114,254	115,573	114,009
Diluted earnings per share (in dollars per share)	$ 1.57	$ 1.43	$ 3.20	$ 2.47