Note D - Fair Value Measurements (Details Textual) - Fair Value, Recurring [Member] - Fair Value, Inputs, Level 2 [Member] - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument, Fair Value Disclosure, Difference Between Fair Value and Carrying Value	$ 126.6	$ 97.6
Debt Instrument, Fair Value Disclosure	$ 1,717.8	$ 1,762.3