Note H - Employee Benefit Plans (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Qualified Plan II [Member] | Pension Plan [Member]
Defined Benefit Plan, Expected Future Benefit Payment, Year One	$ 1.3
Qualified Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Employer	0.2
Restoration Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Benefits Paid	$ 0.4	$ 0.4