DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS - Accounts Receivable, net (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Mar. 31, 2017
Accounts receivable, net [Line Items]
Accounts receivable	$ 196,175	$ 184,759
Accounts receivable, net	143,919	141,177
Provision for returns [Member]
Accounts receivable, net [Line Items]
Accounts receivable, reserves	(11,438)	(10,541)
Provision for promotions, rebates and other [Member]
Accounts receivable, net [Line Items]
Accounts receivable, reserves	(39,886)	(32,438)
Provisions for doubtful accounts and sales allowances [Member]
Accounts receivable, net [Line Items]
Accounts receivable, reserves	$ (932)	$ (603)