Annual report pursuant to Section 13 and 15(d)

SHARE-BASED PAYMENTS - Narrative (Details)

v3.24.3
SHARE-BASED PAYMENTS - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Jun. 30, 2021
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2022
Nov. 30, 2024
Share-based compensation, aggregate disclosures [Abstract]          
Total stock-based compensation cost   $ 18,478 $ 17,308 $ 17,432  
Future income tax benefit from compensation expense recognized   $ 4,185 $ 3,821 $ 3,821  
Restricted Stock          
Share-based compensation, aggregate disclosures [Abstract]          
Percent of shares vested on time   40.00%      
Unrecognized compensation cost on unvested awards   $ 18,469      
Weighted average period of recognition of unrecognized compensation cost on non-vested awards   1 year 9 months 18 days      
Restricted Stock | Tranche One          
Share-based compensation, aggregate disclosures [Abstract]          
Vesting percentage   50.00%      
Restricted Stock | Tranche Two          
Share-based compensation, aggregate disclosures [Abstract]          
Vesting percentage   25.00%      
Restricted Stock | Tranche Three          
Share-based compensation, aggregate disclosures [Abstract]          
Vesting percentage   25.00%      
Stock Options | Tranche One          
Share-based compensation, aggregate disclosures [Abstract]          
Vesting percentage   33.33%      
Stock Options | Tranche Two          
Share-based compensation, aggregate disclosures [Abstract]          
Vesting percentage   33.33%      
Stock Options | Tranche Three          
Share-based compensation, aggregate disclosures [Abstract]          
Vesting percentage   33.33%      
Equity Incentive Plan 2017          
Share-based compensation, aggregate disclosures [Abstract]          
Grants in period (in shares) 75,000        
Grants in period, exercise price (in dollars per share) $ 41.70        
Equity Incentive Plan 2017 | Share-Based Payment Arrangement          
Share-based compensation, aggregate disclosures [Abstract]          
Term of plan (in years)   10 years      
Amended 2017 Plan          
Share-based compensation, aggregate disclosures [Abstract]          
Shares reserved for future issuance under award plan (in shares)   3,450,000      
Shares issued (in shares)   1,187,901      
Grants in period (in shares)   75,000      
Share-based awards outstanding (in shares)   1,707,349      
Percentage of outstanding stock, maximum   200.00%      
Amended 2017 Plan | Subsequent Event          
Share-based compensation, aggregate disclosures [Abstract]          
Shares reserved for future issuance under award plan (in shares)         4,950,000
Amended 2017 Plan | Time-Based Restricted Share Units          
Share-based compensation, aggregate disclosures [Abstract]          
Grants in period (in shares)   1,233,583      
Amended 2017 Plan | Performance-Based Restricted Share Units          
Share-based compensation, aggregate disclosures [Abstract]          
Grants in period (in shares)   1,579,514      
2014 Director Fee Plan          
Share-based compensation, aggregate disclosures [Abstract]          
Annual retainer fee paid to non-employee directors   $ 90      
Annual retainer fee paid to non-employee chairman of the board   $ 210      
Director Fee Plans          
Share-based compensation, aggregate disclosures [Abstract]          
Shares deferred under the director fee plan (in shares)   51,147      
Value of annual stock-based grant   $ 140      
Director Fee Plans | Restricted Stock          
Share-based compensation, aggregate disclosures [Abstract]          
Grants in period (in shares)   377,460      
2019 Director Fee Plan          
Share-based compensation, aggregate disclosures [Abstract]          
Shares reserved for future issuance under award plan (in shares)   300,000      
2019 Director Fee Plan | Restricted Stock          
Share-based compensation, aggregate disclosures [Abstract]          
Grants in period (in shares)   204,231      
Unvested shares (in shares)   71,549      
All Plans | Restricted Stock          
Share-based compensation, aggregate disclosures [Abstract]          
Grants in period (in shares)   458,320      
Unvested shares (in shares)   1,707,349 1,728,697