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Segment Information (Tables)
6 Months Ended
Jul. 01, 2011
Segment Information [Abstract]  
Summary of revenue by product type
                                 
    Three months ended     Six months ended  
    July 1, 2011     July 2, 2010     July 1, 2011     July 2, 2010  
            (In thousands)          
Video processing products
  $ 51,525     $ 49,998     $ 115,283     $ 88,888  
Production and playout products
    25,453             46,386        
Edge and access products
    40,178       34,263       71,354       69,807  
Service and support
    16,840       11,283       33,808       21,671  
 
                       
 
  $ 133,996     $ 95,544     $ 266,831     $ 180,366  
 
                       
Summary of revenue by net geographic region
                                 
    Three months ended     Six months ended  
    July 1, 2011     July 2, 2010     July 1, 2011     July 2, 2010  
    (In thousands)  
Net revenue:
                               
United States
  $ 55,578     $ 49,259     $ 114,532     $ 91,850  
International
    78,418       46,285       152,299       88,516  
 
                       
 
  $ 133,996     $ 95,544     $ 266,831     $ 180,366  
 
                       
Summary of property and equipment
                 
    July 1, 2011     December 31, 2010  
    (In thousands)  
Property and equipment, net:
               
United States
  $ 31,875     $ 32,104  
International
    7,803       7,721  
 
           
 
  $ 39,678     $ 39,825