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Information About Revenue By Geographic Areas (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Geographic revenue based on customer location        
Revenue $ 83,730 $ 59,558 $ 236,745 $ 167,484
North America
       
Geographic revenue based on customer location        
Revenue 31,569 21,556 87,896 60,762
United States | Total revenue | Geographic concentration
       
Geographic revenue based on customer location        
Concentration risk percentage 32.00% 32.00% 32.00% 32.00%
Europe
       
Geographic revenue based on customer location        
Revenue 28,519 20,746 83,452 59,927
Rest of the world
       
Geographic revenue based on customer location        
Revenue $ 23,642 $ 17,256 $ 65,397 $ 46,795