Note O - Restructuring Activities - Restructuring Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring expense	$ 0	$ 6,359	$ 9,400	$ 11,800
Employee Severance [Member]
Restructuring expense		2,482
Lease Impairment and Termination Charges [Member]
Restructuring expense		868
Capital Losses from Asset Disposal [Member]
Restructuring expense		33
Facility Closing [Member]
Restructuring expense		2,976
Facility, Asset Impairment and Other Expense [Member]
Restructuring expense		$ 3,877