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SHAREHOLDERS' EQUITY (Tables) | 12 Months Ended
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Sep. 30, 2025
Stockholders' Equity Note [Abstract] |
Schedule of Components of Accumulated Other Comprehensive Income (Loss) | Components of accumulated other comprehensive income (loss) were as follows:
| September 30,
(in thousands) | 2025 |  | 2024 |  | 2023
Pre-tax amounts: |  |  |  |  |
Unrealized pension actuarial gain (loss) on defined benefit pension plans | $ | 3,336 |  |  | $ | (7,632) |  |  | $ | (10,407) |
Unrealized gain (loss) on available-for-sale debt security | 383 |  |  | (662) |  |  | — |
Unrealized gain on foreign currency translation adjustment | 45,682 |  |  | — |  |  | — |
| $ | 49,401 |  |  | $ | (8,294) |  |  | $ | (10,407) |
After-tax amounts: |  |  |  |  |
Unrealized pension actuarial gain (loss) on defined benefit pension plans | $ | 4,470 |  |  | $ | (5,838) |  |  | $ | (7,981) |
Unrealized gain (loss) on available-for-sale debt security | 296 |  |  | (512) |  |  | — |
Unrealized gain on foreign currency translation adjustment | 40,198 |  |  | — |  |  | — |
| $ | 44,964 |  |  | $ | (6,350) |  |  | $ | (7,981) |
Schedule of Changes in Accumulated Other Comprehensive Income (Loss) | The following is a summary of the changes in accumulated other comprehensive loss, net of tax, for the fiscal year ended September 30, 2025:
(in thousands) | Unrealized Loss on Available-for-Sale Securities |  | Defined Benefit Pension Plan |  | Foreign Currency Translation Adjustment |  | Total
Balance at September 30, 2024 | $ | (512) |  |  | $ | (5,838) |  |  | $ | — |  |  | $ | (6,350) |
Activity during the period |  |  |  |  |  |  |
Other comprehensive income before reclassifications | 684 |  |  | — |  |  | 40,198 |  |  | 40,882 |
Amounts reclassified from accumulated other comprehensive income | 124 |  |  | 10,308 |  |  | — |  |  | 10,432 |
Net current-period other comprehensive income | 808 |  |  | 10,308 |  |  | 40,198 |  |  | 51,314 |
Balance at September 30, 2025 | $ | 296 |  |  | $ | 4,470 |  |  | $ | 40,198 |  |  | $ | 44,964 |

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