DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS - Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Apr. 01, 2018	Mar. 31, 2018
Accrued Liabilities [Abstract]
Short term deferred revenue	$ 123,537		$ 2,986
Employee compensation and benefits	105,655		28,655
Income tax payable	30,018		5,583
Provision for returns	20,337		0
Current portion long term debt	12,750		0
Accrued interest	8,682		10,424
Warranty obligation	15,032		7,550
VAT/Sales tax payable	10,060		5,297
Derivative liabilities	2,802		2,947
Accrued other	123,322		16,655
Accrued liabilities	$ 452,194	$ 91,230	$ 80,097