ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands		Sep. 30, 2018	Mar. 31, 2018
Equity [Abstract]
Accumulated unrealized gain (loss) on cash flow hedges	[1]	$ 2,798	$ (1,663)
Accumulated foreign currency translation adjustments		2,869	4,685
Accumulated unrealized loss on investments		0	(152)
Accumulated other comprehensive income		$ 5,667	$ 2,870

[1] Refer to Note 13, Derivatives, which discloses the nature of the Company's derivative assets and liabilities as of March 31, 2018 and September 30, 2018.