v3.24.3
Share-Based Payments - Service-Based Awards and Stock Option Awards (Details) - Employee Stock Option - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Stock Options, Number of Outstanding Options    
Outstanding at the beginning of the period (in shares) 2,478,000  
Granted (in shares) 0 0
Exercised (in shares) (194,000)  
Forfeited or expired (in shares) (251,000)  
Outstanding at the end of the period (in shares) 2,033,000 2,478,000
Exercisable at the end of the period (in shares) 1,947,000  
Stock Options, Weighted Average Exercise Price    
Outstanding at the beginning of the period (in dollars per share) $ 17.45  
Exercised (in dollars per share) 9.09  
Forfeited or expired (in dollars per share) 20.72  
Outstanding at the end of the period (in dollars per share) 17.84 $ 17.45
Exercisable at the end of the period (in dollars per share) $ 17.86  
Stock Options, Weighted Average Remaining Contractual Term    
Weighted average remaining contractual term (in years) 4 years 1 month 6 days 5 years 2 months 12 days
Exercisable at September 30, 2023 4 years  
Stock Options, Aggregate Intrinsic Value    
Outstanding balance at period end (in dollars) $ 1,761 $ 0
Exercisable at the end of the period (in dollars) $ 1,761