INCOME TAXES - Summary of Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Current income tax expense:
Federal	$ 14,191	$ 15,912	$ 29,238
State	1,925	3,152	2,223
Foreign	12,249	11,175	6,628
Current income tax expense, Total	28,365	30,239	38,089
Deferred income tax expense (benefit):
Federal	(113,122)	(8,278)	(30,216)
State	(10,037)	3,578	(4,461)
Foreign	(3,677)	(6,645)	(7,482)
Deferred income tax expense (benefit), Total	(126,836)	(11,345)	(42,159)
Income tax expense (benefit), Total	$ (98,471)	$ 18,894	$ (4,070)