Financial Instruments (Other Investments) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Investment Holdings [Line Items]
Life Insurance Contracts	$ 42,639	$ 42,242
Other Investments	76,633	73,976
Equity Mutual Fund
Investment Holdings [Line Items]
Mutual Funds	17,484	15,837
Fixed Income Mutual Fund
Investment Holdings [Line Items]
Mutual Funds	$ 16,510	$ 15,897