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Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions
The Company used the Black-Scholes model to estimate the fair value of the ESPP awards with the following weighted-average assumptions:
Six Months Ended
June 30, 2020June 30, 2019
Expected volatility factor
0.21 - 0.22
0.26 - 0.29
Risk free interest rate1.56% - 2.06%2.19% - 2.49%
Expected dividend yield1.20% - 1.39%1.27% - 1.31%
Expected life (in years)0.50.5
Schedule of Total Stock-based Compensation Recognized by Income Statement Classification
The detail of the total stock-based compensation recognized by income statement classification is as follows (in thousands):
Three Months EndedSix Months Ended
Income Statement ClassificationsJune 30, 2020June 30, 2019June 30, 2020June 30, 2019
Cost of subscription, support and services$3,404  $2,956  $6,166  $5,158  
Research and development30,987  25,419  52,583  53,256  
Sales, marketing and services27,843  24,424  48,229  44,350  
General and administrative23,128  15,521  36,707  30,790  
Total$85,362  $68,320  $143,685  $133,554