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SHAREHOLDERS' EQUITY (Tables) | 12 Months Ended
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Sep. 30, 2023
Stockholders' Equity Note [Abstract] |
Schedule of Components of Accumulated Other Comprehensive Income (Loss) | Components of accumulated other comprehensive loss were as follows:
| September 30,
(in thousands) | 2023 |  | 2022 |  | 2021
Pre-tax amounts: |  |  |  |  |
Unrealized actuarial loss | $ | (10,407) |  |  | $ | (15,703) |  |  | $ | (26,268) |
| $ | (10,407) |  |  | $ | (15,703) |  |  | $ | (26,268) |
After-tax amounts: |  |  |  |  |
Unrealized actuarial loss | $ | (7,981) |  |  | $ | (12,072) |  |  | $ | (20,244) |
| $ | (7,981) |  |  | $ | (12,072) |  |  | $ | (20,244) |
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, 2023:
(in thousands) | Defined Benefit Pension Plan
Balance at September 30, 2022 | $ | (12,072) |
Activity during the period |
Amounts reclassified from accumulated other comprehensive loss | 4,091 |
Net current-period other comprehensive income | 4,091 |
Balance at September 30, 2023 | $ | (7,981) |

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