DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Mar. 31, 2014
Accounts receivable, net [Line Items]
Accounts receivable	$ 175,466		$ 159,592
Accounts receivable, net	150,765		138,301
Inventory, net [Abstract]
Raw materials	26,406		28,071
Work in process	290		985
Finished goods	34,272		28,076
Inventory, net	60,968		57,132
Accrued Liabilities [Abstract]
Employee compensation and benefits	26,400		32,280
Warranty obligation	8,207		7,965
Income taxes payable	4,635		3,092
Accrued other	22,247		23,514
Accrued liabilities	61,489		66,851
Changes in the Warranty Obligation [Roll Forward]
Warranty obligation at beginning of period	7,965	13,410
Warranty provision related to products shipped	2,762	2,441
Deductions for warranty claims processed	(1,370)	(1,367)
Adjustments related to preexisting warranties	(1,150)	(1,267)
Warranty obligation at end of period	8,207	13,217
Provisions for returns [Member]
Accounts receivable, net [Line Items]
Accounts Receivable Reserves	(6,760)		(6,201)
Provisions for promotions, rebates, and other [Member]
Accounts receivable, net [Line Items]
Accounts Receivable Reserves	(17,617)		(14,803)
Provisions for doubtful accounts and sales allowances [Member]
Accounts receivable, net [Line Items]
Accounts Receivable Reserves	$ (324)		$ (287)