Note H - Derivative Financial Instruments - Gain (Loss) Recognized in Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended		9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pre-tax gain (loss) recognized in OCI	$ 0		$ 590				$ 0	$ 9,424
Revenue	130,748		149,692		$ 268,046	$ 311,495
Total	3,513	$ 7,690	2,471	$ 11,184	$ 11,203	$ 13,655
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Total	0		(1,490)				(418)	(2,117)
Hot-rolled Coil Future Contracts [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Revenue	0		(1,490)				(418)	(2,117)
Hot-rolled Coil Future Contracts [Member] | Designated as Hedging Instrument [Member]
Pre-tax gain (loss) recognized in OCI	$ 0		$ 590				$ 0	$ 9,424