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Goodwill (Goodwill by Segments) (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Goodwill [Line Items]    
Goodwill $ 17,518 $ 6,309
RealPlayer Group
   
Goodwill [Line Items]    
Goodwill 580  
Mobile Entertainment
   
Goodwill [Line Items]    
Goodwill 2,115  
Games
   
Goodwill [Line Items]    
Goodwill $ 14,823