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Stockholder's Equity and Stock Based Compensation (Details 6) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Stock compensation expense, allocation of recognized costs      
Total stock-based compensation expense $ 39,182 $ 25,120 $ 8,075
Total unrecognized compensation cost related to unvested awards not yet recognized      
Unrecognized Expense $ 77,305    
Expected Recognition Period 2 years 7 months 2 days    
Employee Stock Purchase Plan [Member]      
Stock compensation expense, allocation of recognized costs      
Total stock-based compensation expense $ 1,700    
Total unrecognized compensation cost related to unvested awards not yet recognized      
Unrecognized Expense $ 209    
Expected Recognition Period 1 month 17 days    
RSUs      
Stock compensation expense, allocation of recognized costs      
Total stock-based compensation expense $ 26,400    
Vesting period 4 years 4 years 4 years
Total unrecognized compensation cost related to unvested awards not yet recognized      
Unrecognized Expense $ 66,546    
Expected Recognition Period 2 years 9 months 15 days    
RSUs | Minimum      
Stock compensation expense, allocation of recognized costs      
Vesting period 3 years    
RSUs | Maximum      
Stock compensation expense, allocation of recognized costs      
Vesting period 4 years    
Stock options to purchase common stock      
Stock compensation expense, allocation of recognized costs      
Total stock-based compensation expense $ 8,400    
Total unrecognized compensation cost related to unvested awards not yet recognized      
Unrecognized Expense $ 10,550    
Expected Recognition Period 1 year 4 months 10 days    
Stock options to purchase common stock | 2006 Stock Plan      
Stock compensation expense, allocation of recognized costs      
Vesting period 4 years    
Percentage of awards which will vest after one year 25.00%    
Period of beginning of vesting of awards from grant date 1 year    
MSU's      
Stock compensation expense, allocation of recognized costs      
Total stock-based compensation expense $ 3,600    
Cost of subscription and support revenue      
Stock compensation expense, allocation of recognized costs      
Total stock-based compensation expense 2,691 $ 1,626 $ 496
Cost of professional services and other revenue      
Stock compensation expense, allocation of recognized costs      
Total stock-based compensation expense 4,320 2,363 690
Research and development      
Stock compensation expense, allocation of recognized costs      
Total stock-based compensation expense 7,637 5,353 2,084
Sales and marketing      
Stock compensation expense, allocation of recognized costs      
Total stock-based compensation expense 12,655 8,860 2,293
General and administrative      
Stock compensation expense, allocation of recognized costs      
Total stock-based compensation expense 11,879 $ 6,918 $ 2,512
Internal use software projects      
Stock compensation expense, allocation of recognized costs      
Capitalized stock-based compensation expense 900    
Vessel | RSUs      
Stock compensation expense, allocation of recognized costs      
Stock-based compensation from performance based restricted stock units $ 1,300