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SHARE-BASED PAYMENTS - Narrative (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation cost |  | $ 23,065 | $ 18,478 | $ 17,308
Future income tax benefit from compensation expense recognized |  | 5,387 | $ 4,185 | $ 3,821
SGK Brand Solutions | Discontinued Operations, Disposed of by Sale |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Accelerated cost |  | $ 3,470 |  |
Restricted Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Grants in period (in shares) |  | 671,200 |  |
Percent of shares vested on time |  | 40.00% |  |
Vesting percentage |  | 100.00% |  |
Unrecognized compensation cost on unvested awards |  | $ 13,945 |  |
Weighted average period of recognition of unrecognized compensation cost on non-vested awards |  | 1 year 8 months 12 days |  |
Unvested shares (in shares) |  | 1,648,145 | 1,707,349 |
Equity Incentive Plan 2017 | Share-Based Payment Arrangement |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Term of plan (in years) |  | 10 years |  |
Amended 2017 Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Shares reserved for future issuance under award plan (in shares) |  | 4,950,000 |  |
Shares issued (in shares) |  | 1,896,757 |  |
Grants in period (in shares) |  | 75,000 |  |
Share-based awards outstanding (in shares) |  | 1,648,145 |  |
Percentage of outstanding stock, maximum |  | 200.00% |  |
Amended 2017 Plan | Time-Based Restricted Share Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Grants in period (in shares) |  | 1,518,963 |  |
Amended 2017 Plan | Performance-Based Restricted Share Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Grants in period (in shares) |  | 1,963,334 |  |
Director Fee Plans |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Shares deferred under stock based compensation plan (in shares) |  | 57,179 |  |
Value of annual stock-based grant |  | $ 140 |  |
Director Fee Plans | Restricted Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Grants in period (in shares) |  | 439,740 |  |
2014 Director Fee Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Annual retainer fee paid to non-employee directors |  | $ 90 |  |
Annual retainer fee paid to non-employee chairman of the board |  | $ 210 |  |
2019 Director Fee Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Shares reserved for future issuance under award plan (in shares) |  | 300,000 |  |
2019 Director Fee Plan | Subsequent Event |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Grants in period (in shares) | 550,000 |  |  |
2019 Director Fee Plan | Restricted Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Grants in period (in shares) |  | 266,511 |  |
Unvested shares (in shares) |  | 98,945 |  |

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