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Stock-based Compensation - Schedule of Classification of Compensation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Mar. 31, 2026 | Mar. 31, 2025 | Mar. 31, 2026 | Mar. 31, 2025
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | $ 68,599 | $ 51,512 | $ 126,466 | $ 107,363
Sales and marketing |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | 20,032 | 13,545 | 35,230 | 31,613
Research and development |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | 18,157 | 14,391 | 34,072 | 30,546
General and administrative |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | 23,271 | 18,069 | 44,031 | 33,784
License | Cost of Sales |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | 107 | 72 | 206 | 106
Support and cloud services | Cost of Sales |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | 5,216 | 3,912 | 9,462 | 7,970
Professional services | Cost of Sales |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | $ 1,816 | $ 1,523 | $ 3,465 | $ 3,344

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