Note H - Employee Benefit Plans - Net Period of Net Periodic Cost (Details) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Interest cost	$ 1,772	$ 1,260	$ 3,544	$ 2,520
Expected return on plan assets	(1,554)	(1,468)	(3,108)	(2,936)
Recognized actuarial loss	630	719	1,260	1,438
Net periodic benefit cost	$ 848	$ 511	$ 1,696	$ 1,022