Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation Plans and Awards - Schedule of stock-based compensation expenses related to all employee and non-employee stock-based awards (Details)

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Stock-based Compensation Plans and Awards - Schedule of stock-based compensation expenses related to all employee and non-employee stock-based awards (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Stock-based compensation expenses:        
Total stock-based compensation expense $ 32,432 $ 27,484 $ 71,087 $ 50,679
Cost of revenue - Other        
Stock-based compensation expenses:        
Total stock-based compensation expense 1,544 1,406 3,021 2,613
Cost of revenue - Ticketing service        
Stock-based compensation expenses:        
Total stock-based compensation expense 67 0 127 0
Product development        
Stock-based compensation expenses:        
Total stock-based compensation expense 7,243 5,354 15,744 9,959
Sales and marketing        
Stock-based compensation expenses:        
Total stock-based compensation expense 15,128 13,327 28,741 24,671
General and administrative        
Stock-based compensation expenses:        
Total stock-based compensation expense $ 8,450 $ 7,397 23,454 $ 13,436
Executive severance        
Stock-based compensation expenses:        
Total stock-based compensation expense     $ 6,800