Note 15 - Stockholders' Equity (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Feb. 28, 2025	Dec. 31, 2024	Oct. 31, 2023
Dividends Payable, Current	$ 74.7		$ 74.7			$ 59.8
Accrued Dividend Equivalents	$ 8.6		$ 8.6			$ 5.8
Stock Repurchased and Retired During Period, Shares (in shares)	2,000	6,000	6,000	19,000
Payments for Repurchase of Common Stock	$ 2.1	$ 5.5	$ 4.7	$ 14.2
Share Repurchase Program, Remaining Authorized, Amount	$ 495.3		$ 495.3
Maximum [Member]
Share Repurchase Program, Authorized, Amount					$ 500.0		$ 640.0