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Equity-Based Compensation (Details 3) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Non-cash equity-based compensation expense related to the 2012 Plan and 2012 ESPP        
Total $ 6,334 $ 1,852 $ 15,728 $ 4,422
Cost of revenue
       
Non-cash equity-based compensation expense related to the 2012 Plan and 2012 ESPP        
Total 336 126 953 291
Sales and marketing
       
Non-cash equity-based compensation expense related to the 2012 Plan and 2012 ESPP        
Total 819 358 2,689 865
Product development
       
Non-cash equity-based compensation expense related to the 2012 Plan and 2012 ESPP        
Total 1,805 406 4,529 990
General and administrative
       
Non-cash equity-based compensation expense related to the 2012 Plan and 2012 ESPP        
Total $ 3,374 $ 962 $ 7,557 $ 2,276