Annual report pursuant to Section 13 and 15(d)

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

v3.19.3
Equity - Summary of the Company's RSU Activity (Details) - Unvested restricted stock units - $ / shares
12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Summary of RSU activity      
Non-vested shares outstanding at the beginning of the period (in shares) 661,933    
Granted (in shares) 382,706    
Vested (in shares) (357,934)    
Forfeited (in shares) (40,576)    
Non-vested shares outstanding at the end of the period (in shares) 646,129 661,933  
Weighted-Average Grant-Date Fair Value      
Non-vested shares outstanding at the beginning of the period (in dollars per share) $ 57.78    
Granted (in dollars per share) 66.96 $ 64.33 $ 53.63
Vested (in dollars per share) 58.70    
Forfeited (in dollars per share) 59.57    
Non-vested shares outstanding at the end of the period (in dollars per share) $ 62.60 $ 57.78