DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS (Details) (USD $)	12 Months Ended
	Mar. 31, 2013		Mar. 31, 2012		Mar. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	$ 151,250,000		$ 133,233,000
Accounts receivable, net	128,209,000		111,771,000
Inventory, net [Abstract]
Raw materials	28,743,000		14,062,000
Work in process	82,000		2,740,000
Finished goods	38,610,000		36,911,000
Inventory, Net	67,435,000		53,713,000
Property, Plant and Equipment, Net [Abstract]
Land	13,961,000		6,531,000
Buildings and Improvements	72,263,000		67,417,000
Machinery and Equipment	88,538,000		90,643,000
Software	30,538,000		28,951,000
Construction in Progress	16,101,000		2,323,000
Property, Plant and Equipment, Gross	221,401,000		195,865,000
Accumulated Depreciation and Amortization	(122,290,000)		(119,706,000)
Property, plant and equipment, net	99,111,000		76,159,000
Depreciation and Amortization Expense	15,800,000		13,300,000		13,700,000
Unamortized Capitalized Computer Software Costs	6,100,000		6,700,000
Amortization Expense Related to Capitalized Software Costs	2,900,000		3,100,000		3,100,000
Accrued Liabilities [Abstract]
Employee compensation and benefits	29,796,000		24,458,000
Warranty obligation	13,410,000		13,346,000
Accrued advertising and sales and marketing	3,735,000		1,317,000
Income taxes payable	3,376,000		222,000
Restructuring and other related charges	1,165,000	[1]	0	[1]
Accrued other	14,937,000		12,724,000
Accrued liabilities	66,419,000		52,067,000
Movement in Standard Product Warranty Accrual [Roll Forward]
Warranty obligation at beginning of year	13,346,000		11,016,000
Warranty provision relating to products shipped	16,287,000		17,061,000
Deductions for warranty claims processed	(16,223,000)		(14,731,000)
Warranty obligation at end of year	13,410,000		13,346,000		11,016,000
Buildings and improvements | Minimum
Property, Plant and Equipment, Net [Abstract]
Useful life	7 years
Buildings and improvements | Maximum
Property, Plant and Equipment, Net [Abstract]
Useful life	30 years
Machinery and equipment | Minimum
Property, Plant and Equipment, Net [Abstract]
Useful life	2 years
Machinery and equipment | Maximum
Property, Plant and Equipment, Net [Abstract]
Useful life	10 years
Software | Minimum
Property, Plant and Equipment, Net [Abstract]
Useful life	5 years
Software | Maximum
Property, Plant and Equipment, Net [Abstract]
Useful life	6 years
Provision For Returns
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable Reserves	(8,957,000)		(7,613,000)
Provision for promotions and rebates
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable Reserves	(13,675,000)		(12,756,000)
Provision for doubtful accounts and sales allowances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable Reserves	$ (409,000)		$ (1,093,000)

[1] Refer to Note 8, Restructuring and Other Related Charges, for more information regarding the Company's restructuring activity.