DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS - Accounts Receivable, net (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Apr. 01, 2018	Mar. 31, 2018
Accounts receivable, net [Line Items]
Accounts receivable	$ 427,326		$ 202,270
Accounts receivable, net	363,837	$ 167,109	152,888
Provision for returns [Member]
Accounts receivable, net [Line Items]
Accounts receivable, reserves	(154)		(10,225)
Provision for promotions, rebates and other [Member]
Accounts receivable, net [Line Items]
Accounts receivable, reserves	(57,708)		(38,284)
Provisions for doubtful accounts and sales allowances [Member]
Accounts receivable, net [Line Items]
Accounts receivable, reserves	$ (5,627)		$ (873)