EARNINGS PER SHARE AND ACCUMULATED OTHER COMPREHENSIVE INCOME - Antidilutive Securities Excluded from EPS Calculation (Details) - $ / shares	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding shares	3,161,465	2,751,470	3,179,147	2,794,032
Weighted average exercise price - antidilutive	$ 26.58	$ 31.26	$ 26.57	$ 33.25
Restricted Stock Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding shares	841,574	773,799	646,040	515,395
Weighted average exercise price - antidilutive	$ 6.44	$ 12.29	$ 8.51	$ 13.68