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Retirement Benefits (Narrative) (Details) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2024 | Jun. 30, 2023
Defined Benefit Plan Disclosure [Line Items] |  |  |
Percentage of annual contribution equal to eligible prior year wages |  | 5.00% |
Common shares issued from treasury to settle benefit obligations | $ 1,050 | $ 22,937 | $ 19,467
Treasury Stock [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Common shares issued from treasury stock for benefit plans, shares | 21 | 180 | 189
Common shares issued from treasury to settle benefit obligations | $ 1,050 | $ 8,971 | $ 8,524

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