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Restructuring And Impairments (Tables)
12 Months Ended
Mar. 31, 2012
Restructuring And Impairments [Abstract]  
Schedule Of Restructuring Charges And Cash Payments
    Severance pay     Facility        
    and benefits     exit costs     Total  
 
Accrued restructuring balance at April 1, 2011 $ -   $ -   $ -  
Charges to operations   5,319     327     5,646  
Cash payments   (4,639 )   (33 )   (4,672 )
Accrued restructuring balance at March 31, 2012 $ 680   $ 294   $ 974