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Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 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:
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
Expected volatility factor
0.21 - 0.35
0.22 - 0.29
0.21 - 0.35
0.22 - 0.29
Risk free interest rate
0.13% - 1.56%
2.06% - 2.49%
0.13% - 2.06%
2.06% - 2.49%
Expected dividend yield
0.92% - 1.20%
1.31% - 1.39%
0.92% - 1.39%
1.27% - 1.39%
Expected life (in years)0.50.50.50.5
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 Ended September 30,Nine Months Ended September 30,
Income Statement Classifications2020201920202019
Cost of subscription, support and services$3,542 $2,898 $9,708 $8,056 
Research and development28,803 25,505 81,386 78,761 
Sales, marketing and services28,411 23,838 76,640 68,188 
General and administrative24,413 16,728 61,120 47,518 
Total$85,169 $68,969 $228,854 $202,523