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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	Sep. 30, 2020	Sep. 30, 2019
Financial assets:
Total financial assets	$ 178,651	$ 144,335
Financial liabilities:
Total financial liabilities	51,387
Cross Currency Interest Rate Swaps [Member]
Financial assets:
Cross currency interest rate swaps		24,758
Financial liabilities:
Cross currency interest rate swaps	51,387
Cash [Member]
Financial assets:
Cash	112,817	52,971
Investments in Reverse Repurchase Agreements [Member]
Financial assets:
Investments		886
Investments in Term Deposits with Foreign Banks [Member]
Financial assets:
Investments	40,453	45,216
Equity Securities [Member]
Financial assets:
Equity securities	25,381	20,504
Level 1 [Member]
Financial assets:
Total financial assets	178,651	119,577
Level 1 [Member] | Cash [Member]
Financial assets:
Cash	112,817	52,971
Level 1 [Member] | Investments in Reverse Repurchase Agreements [Member]
Financial assets:
Investments		886
Level 1 [Member] | Investments in Term Deposits with Foreign Banks [Member]
Financial assets:
Investments	40,453	45,216
Level 1 [Member] | Equity Securities [Member]
Financial assets:
Equity securities	25,381	20,504
Level 2 [Member]
Financial assets:
Total financial assets		24,758
Financial liabilities:
Total financial liabilities	51,387
Level 2 [Member] | Cross Currency Interest Rate Swaps [Member]
Financial assets:
Cross currency interest rate swaps		$ 24,758
Financial liabilities:
Cross currency interest rate swaps	$ 51,387

X

- 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 http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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X

- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

No definition available.

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- References

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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.

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- Definition

Fair value portion of asset contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward contracts, and swaps.

+ References

No definition available.

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- Definition

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+ References

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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 http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.4)
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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