XML 116 R96.htm IDEA: XBRL DOCUMENT v3.20.4
Share-Based Compensation - Stock Options Activity (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Share-based Payment Arrangement [Abstract]    
Shares available for grant, Beginning (in shares) 692,652  
Share-based compensation arrangement by share-based payment award, options, forfeitures in period (in shares) (13,662)  
Share-based compensation arrangement by share-based payment award, options, Expirations (in shares) (18,169)  
Shares available for grant, Ending (in shares) 724,483 692,652
Number of Options Outstanding    
Number of options outstanding, Beginning (in shares) 1,684,378  
Number of options outstanding, Exercised (in shares) (244,511)  
Number of options outstanding, Ending (in shares) 1,408,036 1,684,378
Number of options outstanding, Exercisable (in shares) 423,112  
Weighted Average  Exercise Price    
Weighted average  exercise price, Beginning (in dollar per share) $ 38.79 $ 37.59
Weighted average  exercise price, Exercise (in dollar per share) 30.56  
Weighted average  exercise price, Forfeited (in dollar per share) 39.64  
Weighted average  exercise price, Expired (in dollar per share) 37.30  
Weighted average  exercise price, Exercisable (in dollar per share) 29.25  
Weighted Average Grant Date Fair Value    
Weighted average grant date fair value, Beginning (in dollar per share) 11.32  
Weighted average grant date fair value, Exercised (in dollar per share) 11.36  
Weighted average grant date fair value, Forfeited (in dollar per share) 8.62  
Weighted average grant date fair value, Expired (in dollar per share) 8.19  
Weighted average grant date fair value, Ending (in dollar per share) 11.38 $ 11.32
Weighted average grant date fair value, Exercisable (in dollar per share) $ 12.64  
Stock Option Activity, Additional Disclosures    
Weighted average remaining term (in years) 4 years 1 month 28 days 4 years 7 months 13 days
Weighted average remaining term (in years), Exercisable 1 year 4 months 17 days  
Aggregate intrinsic value $ 17.4 $ 9.2
Aggregate intrinsic value, Exercisable $ 9.3