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Fair Value Measurements (Narratives) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Jun. 30, 2023
Not Designated as Hedging Instrument | Forward Foreign Currency Contracts |  |  |
Assets/Liabilities |  |  |
Notional principal amount of forward foreign exchange contracts | $ 18,700,000 |  | $ 3,400,000
Maximum maturities for contracts | 40 days |  | 40 days
Gains (losses) on foreign currency derivative instruments |  | $ (500,000) |
Not Designated as Hedging Instrument | Forward Foreign Currency Contracts | Maximum |  |  |
Assets/Liabilities |  |  |
Gains (losses) on foreign currency derivative instruments | $ (100,000) |  |
Designated as Hedging Instrument | Forward Foreign Currency Contracts |  |  |
Assets/Liabilities |  |  |
Unrealized gain (loss) on derivatives | 0 |  | $ 0
Level 2 Assets and Liabilities |  |  |
Assets/Liabilities |  |  |
Long-term debt, fair value | 197,500,000 |  | 225,000,000
Transfers of assets between Level 1 and Level 2 | 0 | 0 |
Transfers of liabilities between Level 1 and Level 2 | 0 | 0 |
Level 3 Assets and Liabilities |  |  |
Assets/Liabilities |  |  |
Fair value, measurement level 3 assets, transfers | 0 |  | 0
Fair value, measurement level 3 liabilities transfers | 0 |  | 0
Transfers of assets between Level 2 and Level 3 | 0 | 0 |
Transfers of liabilities between Level 2 and Level 3 | 0 | 0 |
Fair value assets impairment | 0 | $ 0 |
Recurring |  |  |
Assets/Liabilities |  |  |
Certificate of deposits | 5,583,000 |  | 7,151,000
Recurring | Level 2 Assets and Liabilities |  |  |
Assets/Liabilities |  |  |
Certificate of deposits | $ 5,583,000 |  | $ 7,151,000

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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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- Definition Maximum amount of time remaining before foreign currency exchange rate derivatives mature or expire, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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