Note H - Employee Benefit Plans - Recognized in Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Qualified Plan [Member]
Long term pension liabilities	$ 18,674	$ 27,359
Nonqualified Plan [Member]
Long term pension liabilities	19,098	25,140
Pension Plan [Member]
Current pension liabilities	1,858	1,801
Total pension liabilities	39,630	54,300
Pension Plan [Member] | Qualified Plan [Member]
Long term pension liabilities	18,674	27,359
Pension Plan [Member] | Nonqualified Plan [Member]
Long term pension liabilities	$ 19,098	$ 25,140