INCOME TAXES (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Effective tax rate	(13.70%)	(19.90%)	14.20%	22.30%
Effective Income Tax Rate Reconciliation, Disposition of Asset, Amount			$ 11,600,000
Effective Income Tax Rate Reconciliation, Disposition of Asset, Percent			14.10%
Income Tax Effects Allocated Directly to Equity, Employee Stock Options			$ 8,600,000
Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-based Payment Arrangement, Percent			10.50%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount	$ 500,000	$ (100,000)	$ (3,000,000.0)	$ (2,900,000)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Percent	170.00%	0.00%	3.60%	3.10%
Unrecognized tax benefits	$ 37,200,000	$ 26,200,000	$ 37,200,000	$ 26,200,000
Accrued penalties					$ 0
Unrecognized Tax Benefits, Increase Resulting From Cost Sharing Of Prior Stock-Based Compensation			$ 9,200,000