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DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS (Tables)
 12 Months Ended
Mar. 31, 2012
Balance Sheet Related Disclosures [Abstract]  
Accounts receivable, net [Table Text Block]
Accounts receivable, net:

 
 
March 31,
(in thousands)
 
2012
 
2011
Accounts receivable
 
$
133,233

 
$
125,137

Provisions for returns
 
(7,613
)
 
(10,437
)
Provisions for promotions, rebates and other
 
(12,756
)
 
(10,460
)
Provisions for doubtful accounts and sales allowances
 
(1,093
)
 
(951
)
Accounts receivable, net
 
$
111,771

 
$
103,289
Inventory, net [Table Text Block]
Inventory, net:

 
 
March 31,
(in thousands)
 
2012
 
2011
Raw materials
 
$
14,062

 
$
15,315

Work in process
 
2,740

 
2,558

Finished goods
 
36,911

 
38,600

Inventory, net
 
$
53,713

 
$
56,473
Accrued Liabilities [Table Text Block]
Accrued liabilities:

 
 
March 31,
(in thousands)
 
2012
 
2011
Employee compensation and benefits
 
$
24,458

 
$
27,478

Warranty obligation
 
13,346

 
11,016

Accrued advertising and sales and marketing
 
1,317

 
2,873

Accrued other
 
12,946

 
18,240

Accrued liabilities
 
$
52,067

 
$
59,607
Changes in the warranty obligation accrual [Table Text Block]
Changes in the warranty obligation, which are included as a component of Accrued liabilities in the Consolidated balance sheets, are as follows:

 
 
Year ended March 31,
(in thousands)
 
2012
 
2011
Warranty obligation at beginning of period
 
$
11,016

 
$
11,006

Warranty provision relating to products shipped during the year
 
17,061

 
14,769

Deductions for warranty claims processed
 
(14,731
)
 
(14,759
)
Warranty obligation at end of period
 
$
13,346


$
11,016
Property, Plant and Equipment [Table Text Block]
Property, plant and equipment, net:

 
 
March 31,
(in thousands)
 
2012
 
2011
Land
 
$
6,531

 
$
5,867

Buildings and improvements (useful life: 7-30 years)
 
67,417

 
55,256

Machinery and equipment (useful life: 2-10 years)
 
90,643

 
87,001

Software (useful life: 5-6 years)
 
28,951

 
27,096

Construction in progress
 
2,323

 
8,556

 
 
195,865

 
183,776

Accumulated depreciation and amortization
 
(119,706
)
 
(113,154
)
Property, plant and equipment, net
 
$
76,159

 
$
70,622