Financial Instruments and Fair Value Measurements (Financial Assets and Liabilities that are Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Sep. 30, 2024
Financial assets:
Total financial assets	$ 65,933	$ 53,910
Financial liabilities:
Total financial liabilities		12,004
Cross Currency Interest Rate Swaps [Member]
Financial assets:
Cross-currency interest rate swaps	8,656
Financial liabilities:
Cross-currency interest rate swaps		12,004
Level 1 [Member]
Financial assets:
Total financial assets	57,277	53,910
Level 2 [Member]
Financial assets:
Total financial assets	8,656
Financial liabilities:
Total financial liabilities		12,004
Level 2 [Member] | Cross Currency Interest Rate Swaps [Member]
Financial assets:
Cross-currency interest rate swaps	8,656
Financial liabilities:
Cross-currency interest rate swaps		12,004
Investments in Banks and Financial Institutions [Member]
Financial assets:
Investments	21,749	23,128
Investments in Banks and Financial Institutions [Member] | Level 1 [Member]
Financial assets:
Investments	21,749	23,128
Equity Securities [Member]
Financial assets:
Equity securities	35,528	30,782
Equity Securities [Member] | Level 1 [Member]
Financial assets:
Equity securities	$ 35,528	$ 30,782