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Debt - Schedule of Principal Payment (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Sep. 30, 2024
Debt Instrument [Line Items]    
Gross Amount $ 530,000 $ 333,373
Senior Notes    
Debt Instrument [Line Items]    
Fiscal 2026 0  
Fiscal 2027 0  
Fiscal 2028 0  
Fiscal 2029 0  
Fiscal 2030 230,000  
Thereafter 300,000  
Gross Amount 530,000  
Senior Notes | 2029 Convertible Notes    
Debt Instrument [Line Items]    
Fiscal 2026 0  
Fiscal 2027 0  
Fiscal 2028 0  
Fiscal 2029 0  
Fiscal 2030 230,000  
Thereafter 0  
Gross Amount 230,000 230,000
Senior Notes | 2032 Convertible Notes    
Debt Instrument [Line Items]    
Fiscal 2026 0  
Fiscal 2027 0  
Fiscal 2028 0  
Fiscal 2029 0  
Fiscal 2030 0  
Thereafter 300,000  
Gross Amount $ 300,000 $ 0