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, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Interest cost	$ 1,260	$ 1,168	$ 2,520	$ 2,336
Expected return on plan assets	(1,468)	(1,688)	(2,936)	(3,376)
Recognized actuarial loss	719	860	1,438	1,720
Net periodic benefit cost	$ 511	$ 340	$ 1,022	$ 680