Note A - Basis of Presentation (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Derivative, Gain (Loss) on Derivative, Net	$ 4,402	$ 3,749	$ 4,832	$ 6,504
Reclassified from Other income (loss) to Gain (loss) on Economic Hedges of Risk [Member]
Derivative, Gain (Loss) on Derivative, Net	$ 3,700		$ 6,500