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Financial Instruments and Fair Value Measurements (Financial Assets that are Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Sep. 30, 2022
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Financial assets: |  |
Total financial assets | $ 54,862 | $ 98,573
Financial liabilities: |  |
Total financial liabilities | 1,987 |
Cross Currency Interest Rate Swaps [Member] |  |
Financial assets: |  |
Cross-currency interest rate swaps |  | 38,168
Financial liabilities: |  |
Cross-currency interest rate swaps | 1,987 |
Level 1 [Member] |  |
Financial assets: |  |
Total financial assets | 54,862 | 60,405
Level 2 [Member] |  |
Financial assets: |  |
Total financial assets |  | 38,168
Financial liabilities: |  |
Total financial liabilities | 1,987 |
Level 2 [Member] | Cross Currency Interest Rate Swaps [Member] |  |
Financial assets: |  |
Cross-currency interest rate swaps |  | 38,168
Financial liabilities: |  |
Cross-currency interest rate swaps | 1,987 |
Investments in Term Deposits with Foreign Banks [Member] |  |
Financial assets: |  |
Investments | 28,313 | 37,605
Investments in Term Deposits with Foreign Banks [Member] | Level 1 [Member] |  |
Financial assets: |  |
Investments | 28,313 | 37,605
Equity Securities [Member] |  |
Financial assets: |  |
Equity securities | 26,549 | 22,800
Equity Securities [Member] | Level 1 [Member] |  |
Financial assets: |  |
Equity securities | $ 26,549 | $ 22,800

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities. + References No definition available. + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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