Annual report pursuant to Section 13 and 15(d)

Equity - Summary of the Company's RSU Activity (Details)

v3.21.2
Equity - Summary of the Company's RSU Activity (Details) - $ / shares
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
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) 642,411    
Granted (in shares) 469,346    
Cancelled/Forfeited (in shares) (49,497)    
Vested (in shares) (346,813)    
Non-vested shares outstanding at the end of the period (in shares) 715,447 642,411  
Weighted-Average Grant-Date Fair Value      
Non-vested shares outstanding at the beginning of the period (in dollars per share) $ 68.73    
Granted (in dollars per share) 76.80    
Cancelled/Forfeited (in dollars per share) 73.82    
Vested (in dollars per share) 67.93    
Non-vested shares outstanding at the end of the period (in dollars per share) $ 74.06 $ 68.73  
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) 642,411    
Granted (in shares) 383,864    
Cancelled/Forfeited (in shares) (49,019)    
Vested (in shares) (346,813)    
Non-vested shares outstanding at the end of the period (in shares) 630,443 642,411  
Weighted-Average Grant-Date Fair Value      
Granted (in dollars per share)   $ 74.26 $ 66.96
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) 0    
Granted (in shares) 85,482    
Cancelled/Forfeited (in shares) (478)    
Vested (in shares) 0    
Non-vested shares outstanding at the end of the period (in shares) 85,004 0