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Note H - Derivative Financial Instruments (Details Textual) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) GT | Mar. 31, 2024 USD ($)
Other Current Assets [Member] |  |  |
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset | $ |  | $ 0.1 | $ 3.0
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] |  |  |
Reclassification from AOCI, Current Period, Tax | $ | $ 0.1 |  |
Not Designated as Hedging Instrument [Member] | Short [Member] |  |  |
Derivative, Nonmonetary Notional Amount, Mass (Gigaton) | GT |  | 1,820 |
Not Designated as Hedging Instrument [Member] | Long [Member] |  |  |
Derivative, Nonmonetary Notional Amount, Mass (Gigaton) | GT |  | 100 |

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- Definition Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 55 -Paragraph 13 -SubTopic 20 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-13 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-20 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483466/210-20-50-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-8 + Details
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