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Equity Incentive Plans - Schedule of Classification of Compensation Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total stock-based compensation expense | $ 206,459 | $ 174,863 | $ 177,289
Sales and marketing |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total stock-based compensation expense | 56,394 | 49,467 | 53,712
Research and development |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total stock-based compensation expense | 58,931 | 41,944 | 34,272
General and administrative |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total stock-based compensation expense | 70,260 | 60,677 | 70,042
License | Cost of Sales |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total stock-based compensation expense | 145 | 272 | 100
Support and cloud services | Cost of Sales |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total stock-based compensation expense | 12,801 | 11,022 | 9,900
Professional services | Cost of Sales |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total stock-based compensation expense | $ 7,928 | $ 11,481 | $ 9,263

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