INCOME TAXES - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Current:
Domestic	$ 2,894	$ 1,037	$ 56
Foreign	50,889	71,773	74,706
Total current	53,783	72,810	74,762
Deferred:
Domestic	422	350	3,779
Foreign	38,154	(21,876)	(67,947)
Total deferred	38,576	(21,526)	(64,168)
Provision for income taxes	$ 92,359	$ 51,284	$ 10,594
Domestic statutory income tax rate	17.00%	17.00%	17.00%