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Stock-Based Compensation - Restricted Stock Unit Activity - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Withholding tax payments on net share settlements on equity awards     $ 4,906  
Proceeds from employees to satisfy tax obligation $ 0      
Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (in dollars per share) $ 58.21 $ 82.34 $ 58.21  
Fair value of restricted stock awards vested $ 2,600 $ 1,900    
Withholding taxes remitted     $ 4,900 $ 25,100
Withholding tax payments on net share settlements on equity awards     $ 4,900 0
Proceeds from employees to satisfy tax obligation       $ 0