DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS (Details) (USD $)	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Mar. 31, 2013
Accounts receivable, net [Line Items]
Accounts receivable	$ 146,280,000		$ 151,250,000
Accounts receivable, net	120,903,000		128,209,000
Inventory, net [Abstract]
Raw materials	28,389,000		28,743,000
Work in process	177,000		82,000
Finished goods	36,748,000		38,610,000
Inventory, net	65,314,000		67,435,000
Property, plant, and equipment, net [Abstract]
Land	13,961,000		13,961,000
Buildings and improvements	72,488,000		72,263,000
Machinery and equipment	88,810,000		88,538,000
Software	31,054,000		30,538,000
Construction in progress	27,035,000		16,101,000
Property, plant, and equipment, gross	233,348,000		221,401,000
Accumulated depreciation and amortization	(125,534,000)		(122,290,000)
Property, plant, and equipment, net	107,814,000		99,111,000
Depreciation and amortization	4,000,000	3,700,000
Unamortized capitalized computer software costs	5,900,000		6,100,000
Accrued Liabilities [Abstract]
Employee compensation and benefits	22,855,000		29,796,000
Warranty obligation	13,217,000		13,410,000
Accrued advertising, sales, and marketing	3,782,000		3,735,000
Deferred revenue	3,731,000		3,072,000
Income taxes payable	1,091,000		3,376,000
Restructuring and other related charges	255,000		1,165,000
Accrued other	12,463,000		11,865,000
Accrued liabilities	57,394,000		66,419,000
Changes in the Warranty Obligation [Roll Forward]
Warranty obligation at March 31, 2013	13,410,000
Warranty provision relating to products shipped	4,523,000
Deductions for warranty claims processed	(4,716,000)
Warranty obligation at June 30, 2013	13,217,000
Buildings and improvements [Member] | Minimum [Member]
Property, plant, and equipment, net [Abstract]
Property, plant, and equipment, estimated useful lives	7 years
Buildings and improvements [Member] | Maximum [Member]
Property, plant, and equipment, net [Abstract]
Property, plant, and equipment, estimated useful lives	30 years
Machinery and equipment [Member] | Minimum [Member]
Property, plant, and equipment, net [Abstract]
Property, plant, and equipment, estimated useful lives	2 years
Machinery and equipment [Member] | Maximum [Member]
Property, plant, and equipment, net [Abstract]
Property, plant, and equipment, estimated useful lives	10 years
Software [Member] | Minimum [Member]
Property, plant, and equipment, net [Abstract]
Property, plant, and equipment, estimated useful lives	5 years
Software [Member] | Maximum [Member]
Property, plant, and equipment, net [Abstract]
Property, plant, and equipment, estimated useful lives	6 years
Provisions for returns [Member]
Accounts receivable, net [Line Items]
Accounts Receivable Reserves	(8,836,000)		(8,957,000)
Provisions for promotions, rebates, and other [Member]
Accounts receivable, net [Line Items]
Accounts Receivable Reserves	(16,119,000)		(13,675,000)
Provisions for doubtful accounts and sales allowances [Member]
Accounts receivable, net [Line Items]
Accounts Receivable Reserves	$ (422,000)		$ (409,000)