DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS - Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	May 31, 2015	Mar. 31, 2015
Accrued Liabilities [Abstract]
Employee compensation and benefits	$ 28,044	$ 22,955
Accrued interest on 5.50% Senior Notes	10,387	10,501
Warranty obligation	8,540	8,537	$ 8,173		$ 7,717
VAT/Sales tax payable	5,143	4,894
Restructuring and other related charges	401	5,783
Accrued other	18,937	17,364
Accrued liabilities	$ 71,452	$ 70,034
5.50% Senior Notes [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate of debt instrument	5.50%			5.50%