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POST EMPLOYMENT BENEFITS - Reconciliation of Projected Benefit Obligations (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023
Retirement Benefits [Abstract] |  |
Accumulated benefit obligation: | $ 15,545 | $ 12,957
Change in projected benefit obligation: |  |
Projected benefit obligation, beginning of period | 12,957 | 12,812
Other | 254 | 0
Interest cost | 741 | 733
Benefits paid | (684) | (570)
Foreign currency translation adjustment | 1,328 | 1,235
Actuarial gains (losses) | 949 | (1,253)
Projected benefit obligation at end of period | 15,545 | 12,957
Change in fair value of plan assets: |  |
Fair value of plan assets, beginning of period | 15,993 | 14,385
Actual gain (loss) on plan assets | 1,764 | (427)
Employer contributions | 0 | 1,226
Foreign currency translation adjustment | 1,614 | 1,379
Benefits paid | (684) | (570)
Fair value of plan assets, end of period | 18,687 | 15,993
Funded status | $ 3,142 | $ 3,036

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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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