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Note G - Derivative Financial Instruments - Gain (Loss) Recognized in Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Jun. 30, 2024 | Jun. 30, 2023
Pre-tax gain (loss) recognized in OCI |  | $ 0
Revenue | $ 114,551 | 137,298
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] |  |
Revenue |  | (418)
Hot-rolled Coil Future Contracts [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] |  |
Revenue |  | (418)
Hot-rolled Coil Future Contracts [Member] | Designated as Hedging Instrument [Member] |  |
Pre-tax gain (loss) recognized in OCI |  | $ 0

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