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DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS (Tables)
 3 Months Ended
Jun. 30, 2013
Balance Sheet Related Disclosures [Abstract]  
Accounts receivable, net [Table Text Block]
Accounts receivable, net:
 
 
June 30,
 
March 31,
(in thousands)
 
2013
 
2013
Accounts receivable
 
$
146,280

 
$
151,250

Provisions for returns
 
(8,836
)
 
(8,957
)
Provisions for promotions, rebates, and other
 
(16,119
)
 
(13,675
)
Provisions for doubtful accounts and sales allowances
 
(422
)
 
(409
)
Accounts receivable, net
 
$
120,903

 
$
128,209
Inventory, net [Table Text Block]
Inventory, net:
 
 
June 30,
 
March 31,
(in thousands)
 
2013
 
2013
Raw materials
 
$
28,389

 
$
28,743

Work in process
 
177

 
82

Finished goods
 
36,748

 
38,610

Inventory, net
 
$
65,314

 
$
67,435
Property, plant, and equipment [Table Text Block]
Property, plant, and equipment, net:
 
 
June 30,
 
March 31,
(in thousands)
 
2013
 
2013
Land
 
$
13,961

 
$
13,961

Buildings and improvements (useful life: 7-30 years)
 
72,488

 
72,263

Machinery and equipment (useful life: 2-10 years)
 
88,810

 
88,538

Software (useful life: 5-6 years)
 
31,054

 
30,538

Construction in progress
 
27,035

 
16,101

 
 
233,348

 
221,401

Accumulated depreciation and amortization
 
(125,534
)
 
(122,290
)
   Property, plant, and equipment, net
 
$
107,814

 
$
99,111
Accrued liabilities [Table Text Block]
Accrued Liabilities:
 
 
June 30,
 
March 31,
(in thousands)
 
2013
 
2013
Employee compensation and benefits
 
$
22,855

 
$
29,796

Warranty obligation
 
13,217

 
13,410

Accrued advertising, sales, and marketing
 
3,782

 
3,735

Deferred revenue
 
3,731

 
3,072

Income taxes payable
 
1,091

 
3,376

Restructuring and other related charges (1)
 
255

 
1,165

Accrued other
 
12,463

 
11,865

Accrued liabilities
 
$
57,394

 
$
66,419
Changes in the warranty obligation [Table Text Block]
Changes in the warranty obligation during the three months ended June 30, 2013 were as follows:

 
 
Three Months Ended
(in thousands)
 
June 30, 2013
Warranty obligation at March 31, 2013
 
$
13,410

Warranty provision relating to products shipped
 
4,523

Deductions for warranty claims processed
 
(4,716
)
Warranty obligation at June 30, 2013
 
$
13,217