DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS - Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017	May 31, 2015
Accrued Liabilities [Abstract]
Employee compensation and benefits	$ 28,599	$ 36,415
Accrued interest on 5.50% Senior Notes	10,331	10,407
Warranty obligation, short-term portion	7,550	6,863
VAT/Sales Tax Payable	5,353	5,433
Restructuring and other related charges	2,947	1,323
Accrued other	25,317	13,844
Accrued liabilities	$ 80,097	$ 74,285
5.50% Senior Notes | Senior notes
Debt Instrument [Line Items]
Stated interest rate	5.50%		5.50%