Financial Investments (Other Investments) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Investment Holdings [Line Items]
Life Insurance Contracts	$ 43,307	$ 41,992
Other Investments	147,421	154,502
Equity Mutual Fund [Member]
Investment Holdings [Line Items]
Fair Value	32,993	39,618
Fixed Income Mutual Fund [Member]
Investment Holdings [Line Items]
Fair Value	70,133	72,253
Marketable Equity Securities [Member]
Investment Holdings [Line Items]
Fair Value	$ 988	$ 639

Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

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