INCOME TAXES - CURRENT INCOME TAX (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Components of (loss) income before income taxes
Domestic	$ 86,050	$ (94,174)	$ (126,582)
Foreign	(9,085)	55,824	(146,298)
Income (loss) before income taxes	76,965	(38,350)	(272,880)
Current:
U.S. federal	19,271	792	2,773
U.S. state and local	2,521	938	(1,406)
Foreign	(13,012)	(31,508)	2,944
Total current income taxes	8,780	(29,778)	4,311
Deferred:
U.S. federal	969	1,211	1,575
U.S. state and local	2,395	(231)	72
Foreign	(2,482)	(1,250)	632
Total deferred income taxes	882	(270)	2,279
Provision (benefit from) for income taxes	$ 9,662	$ (30,048)	$ 6,590
Reconciliation of effective tax rate to the U.S. statutory federal income tax rate
U.S. federal statutory rate	35.00%	35.00%	35.00%
State and local taxes, net of U.S. federal benefit	4.90%	1.60%	0.90%
Tax amortization of goodwill	1.30%	(3.20%)	(0.60%)
Foreign tax rate differential(1)	(1.40%)	25.80%	(12.10%)
Foreign earnings	5.50%	(3.70%)	(1.50%)
Tax credits (2)	(45.80%)	98.70%	(0.00%)
Domestic production deduction	(2.50%)	(0.00%)	(0.00%)
Valuation allowance—domestic	10.10%	(77.80%)	(16.80%)
Valuation allowance—foreign	0.10%	10.40%	(5.10%)
Change in reserves	2.90%	(7.00%)	(1.60%)
Other	2.40%	(1.40%)	(0.60%)
Effective tax rate	12.50%	78.40%	(2.40%)