DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS - Accounts Receivable, net (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Mar. 31, 2016
Accounts receivable, net [Line Items]
Accounts receivable	$ 174,141	$ 163,834
Accounts receivable, net	136,779	128,219
Provision for returns [Member]
Accounts receivable, net [Line Items]
Accounts receivable, reserves	(8,559)	(7,314)
Provision for promotions, rebates and other [Member]
Accounts receivable, net [Line Items]
Accounts receivable, reserves	(28,095)	(27,737)
Provisions for doubtful accounts and sales allowances [Member]
Accounts receivable, net [Line Items]
Accounts receivable, reserves	$ (708)	$ (564)