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RETIREMENT PLANS - NARRATIVE (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023
Defined Benefit Plan, Equity Securities, Micro Cap |  |
Retirement plans |  |
Market capitalization, percentage of equity securities | 47.00% |
Defined Benefit Plan, Equity Securities, Small Cap |  |
Retirement plans |  |
Market capitalization, percentage of equity securities | 20.00% |
Defined Benefit Plan, Equity Securities, Mid Cap |  |
Retirement plans |  |
Market capitalization, percentage of equity securities | 15.00% |
Defined Benefit Plan, Equity Securities, Large Cap |  |
Retirement plans |  |
Market capitalization, percentage of equity securities | 18.00% |
Pension Plan |  |
Retirement plans |  |
Period of employee's highest average earnings on which benefits are based | 5 years |
Accumulated benefit obligation | $ 8,195 | $ 7,511
Expected future contributions | 0 |
SERP |  |
Retirement plans |  |
Accumulated benefit obligation | 1,974 | $ 1,734
Expected future contributions | $ 76 |

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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 contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-18 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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