DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS - Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 202,270	$ 184,068
Accounts receivable, net	152,888	141,177
Provision For Returns
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable reserves	(10,225)	(10,541)
Provision for promotions and rebates
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable reserves	(38,284)	(31,747)
Provision for doubtful accounts and sales allowances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable reserves	$ (873)	$ (603)