DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS Accounts Receivable, net (Details) (USD $) In Thousands	Jun. 30, 2011	Mar. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	$ 131,232	$ 125,137
Accounts receivable, net	108,516	103,289
Provision For Returns [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable Reserves	(8,800)	(10,437)
Provision For Promotions, Rebates And Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable Reserves	(13,390)	(10,460)
Provision For Doubtful Accounts And Sales Allowances [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable Reserves	$ (526)	$ (951)