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Note H - Derivative Financial Instruments - Gain (Loss) Recognized in Other Comprehensive Income (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Pre-tax gain (loss) recognized in OCI       $ 0
Revenue $ 106,759 $ 130,748 $ 221,310 268,046
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