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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Net proceeds from issuance of common stock under incentive compensation and employee purchase plans |  |  | $ 2,591 | $ 2,634
Selling, General, and Administrative Expenses [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense, approximately | $ 5,600 | $ 6,100 | $ 16,400 | $ 17,500

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