Annual report [Section 13 and 15(d), not S-K Item 405]

Equity - Summary of the Company's Restricted Stock Units & Performance Stock Units (Details)

v3.25.3
Equity - Summary of the Company's Restricted Stock Units & Performance Stock Units (Details) - $ / shares
12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Non-vested shares outstanding at the beginning of the period (in shares) 703,622    
Granted (in shares) 684,965    
Vested (in shares) (467,329)    
Forfeited (in shares) (60,521)    
Non-vested shares outstanding at the end of the period (in shares) 860,737 703,622  
Weighted Average Grant Date Fair Value      
Non-vested shares outstanding at the beginning of the period (in dollars per share) $ 79.66    
Granted (in dollars per share) 76.36 $ 82.61 $ 70.38
Vested (in dollars per share) 74.30    
Forfeited (in dollars per share) 77.56    
Non-vested shares outstanding at the end of the period (in dollars per share) $ 80.10 $ 79.66  
Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Non-vested shares outstanding at the beginning of the period (in shares) 435,597    
Granted (in shares) 435,986    
Vested (in shares) (304,008)    
Forfeited (in shares) (52,350)    
Non-vested shares outstanding at the end of the period (in shares) 515,225 435,597  
Performance Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Non-vested shares outstanding at the beginning of the period (in shares) 268,025    
Granted (in shares) 248,979    
Vested (in shares) (163,321)    
Forfeited (in shares) (8,171)    
Non-vested shares outstanding at the end of the period (in shares) 345,512 268,025