DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS - Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Apr. 01, 2018	Mar. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 393,415		$ 202,270
Accounts receivable, net	337,671	$ 167,109	152,888
Provision For Returns
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable reserves	0		(10,225)
Provision for promotions and rebates
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable reserves	(50,789)		(38,284)
Provision for doubtful accounts and sales allowances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable reserves	$ (4,956)		$ (873)