Quarterly report pursuant to Section 13 or 15(d)

INTANGIBLE ASSETS AND GOODWILL (Schedule of Intangible Assets) (Details)

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INTANGIBLE ASSETS AND GOODWILL (Schedule of Intangible Assets) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Mar. 31, 2013
Intangible Assets Excluding Goodwill [Line Items]    
Gross Amount $ 290,390 $ 290,390
Accumulated Amortization (282,026) (277,577)
Net Amount 8,364 12,813
Purchased technology [Member]
   
Intangible Assets Excluding Goodwill [Line Items]    
Gross Amount 180,613 180,613
Accumulated Amortization (178,904) (178,168)
Net Amount 1,709 2,445
Trademarks [Member]
   
Intangible Assets Excluding Goodwill [Line Items]    
Gross Amount 3,900 3,900
Accumulated Amortization (3,900) (3,900)
Net Amount      
Customer lists [Member]
   
Intangible Assets Excluding Goodwill [Line Items]    
Gross Amount 105,719 105,719
Accumulated Amortization (99,222) (95,509)
Net Amount 6,497 10,210
In-process research and development [Member]
   
Intangible Assets Excluding Goodwill [Line Items]    
Gross Amount 158 158
Accumulated Amortization      
Net Amount $ 158 $ 158