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SHAREHOLDERS' EQUITY (Tables) | 3 Months Ended
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Dec. 31, 2020
Stockholders' Equity Note [Abstract] |
Schedule of Components of Accumulated Other Comprehensive Income (Loss) | Components of accumulated other comprehensive loss were as follows:
(in thousands) | December 31, 2020 |  | September 30, 2020
Pre-tax amounts: |  |  |
Unrecognized net actuarial loss | $ | (33,333) |  |  | $ | (33,923) |
| $ | (33,333) |  |  | $ | (33,923) |
After-tax amounts: |  |  |
Unrecognized net actuarial loss | $ | (25,731) |  |  | $ | (26,188) |
| $ | (25,731) |  |  | $ | (26,188) |
Schedule of the Changes in Accumulated Other Comprehensive Income (Loss), Net of Tax, by Component | The following is a summary of the changes in accumulated other comprehensive loss, net of tax, related to the defined benefit pension plan for the three months ended December 31, 2020:
(in thousands) | Three Months Ended December 31, 2020
Balance at September 30, 2020 | $ | (26,188) |
Activity during the period |
Amounts reclassified from accumulated other comprehensive income | 457 |
Net current-period other comprehensive income | 457 |
Balance at December 31, 2020 | $ | (25,731) |

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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e526-108580 + Details
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