INCOME TAXES - Summary of Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Current income tax expense:
Federal	$ 15,912	$ 29,238	$ 25,927
State	3,152	2,223	3,825
Foreign	11,175	6,628	1,307
Current income tax expense, Total	30,239	38,089	31,059
Deferred income tax expense (benefit):
Federal	(8,278)	(30,216)	2,836
State	3,578	(4,461)	17
Foreign	(6,645)	(7,482)	(139)
Deferred income tax expense (benefit), Total	(11,345)	(42,159)	2,714
Income tax expense (benefit), Total	$ 18,894	$ (4,070)	$ 33,773