v3.26.1
Stock-Based Compensation (Fair Value Assumptions) (Details) - Stock Options - $ / shares
9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted average per option grant date fair value $ 21.20 $ 16.23
Assumptions Used For Options Grants [Abstract]    
Risk free interest rate, minimum 3.62% 4.31%
Risk free interest rate, maximum 4.16% 4.38%
Expected term 6 years 6 years
Weighted average volatility 49.00% 48.00%
Expected dividend yield 0.00% 0.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum   48.00%
Minimum    
Assumptions Used For Options Grants [Abstract]    
Expected volatility rate 43.00%  
Maximum    
Assumptions Used For Options Grants [Abstract]    
Expected volatility rate 49.00%