Note O - Employee and Director Benefit Plans - Amounts Recognized in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net Gain	$ (1,013)	$ 229	$ 359
Other Postretirement Benefits Plan [Member]
Net Gain	1,702	606
Prior Service Credit	535	618
Total	$ 2,237	$ 1,224