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Financial Instruments and Fair Value Measurements (Financial Assets and Liabilities that are Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Sep. 30, 2023
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Financial assets: |  |
Total financial assets | $ 234,626 | $ 58,862
Financial liabilities: |  |
Cross-currency interest rate swaps | 4,968 |
Cross Currency Interest Rate Swaps [Member] |  |
Financial assets: |  |
Cross-currency interest rate swaps |  | 5,389
Financial liabilities: |  |
Cross-currency interest rate swaps | 4,968 |
Level 1 [Member] |  |
Financial assets: |  |
Total financial assets | 234,626 | 53,473
Level 2 [Member] |  |
Financial assets: |  |
Total financial assets |  | 5,389
Financial liabilities: |  |
Cross-currency interest rate swaps | 4,968 |
Level 2 [Member] | Cross Currency Interest Rate Swaps [Member] |  |
Financial assets: |  |
Cross-currency interest rate swaps |  | 5,389
Financial liabilities: |  |
Cross-currency interest rate swaps | 4,968 |
Investments in Banks and Financial Institutions [Member] |  |
Financial assets: |  |
Investments | 204,724 | 28,560
Investments in Banks and Financial Institutions [Member] | Level 1 [Member] |  |
Financial assets: |  |
Investments | 204,724 | 28,560
Equity Securities [Member] |  |
Financial assets: |  |
Equity securities | 29,902 | 24,913
Equity Securities [Member] | Level 1 [Member] |  |
Financial assets: |  |
Equity securities | $ 29,902 | $ 24,913

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483467/210-10-45-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
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