Note H - Employee Benefit Plans - Defined Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair value of plan assets at beginning of year	$ 131,741
Fair value of plan assets at end of year	103,891	$ 131,741
Pension Plan [Member]
Benefit obligation at beginning of year	186,041	198,586
Interest cost	5,040	4,674
Actuarial gain	(37,014)	(6,610)
Benefits paid	(10,546)	(10,609)
Benefit obligation at end of year	143,521	186,041
Fair value of plan assets at beginning of year	131,741	129,348
Actual return on plan assets	(20,358)	10,977
Contributions	3,053	2,025
Benefits paid	(10,545)	(10,609)
Fair value of plan assets at end of year	103,891	131,741
Funded status at end of year	$ (39,630)	$ (54,300)