Note H - Components of Net Periodic Benefit Cost - Net Pension Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest cost	$ 1,168	$ 1,473	$ 3,504	$ 4,419
Expected return on plan assets	(1,688)	(1,384)	(5,064)	(4,152)
Recognized actuarial loss	860	812	2,580	2,436
Net periodic benefit cost	$ 340	$ 901	$ 1,020	$ 2,703