Note 17 - Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Federal	$ 11.1	$ 4.2	$ 9.6
Foreign	11.2	3.8	5.6
State	1.9	1.8	2.1
Total current	24.2	9.8	17.3
Federal	0.6	4.4	(2.4)
Foreign	(15.5)	(6.9)	(6.7)
State	(0.1)	0.1	(0.1)
Total deferred	(15.0)	(2.4)	(9.2)
Federal	11.7	8.6	7.2
Foreign	(4.3)	(3.1)	(1.1)
State	1.8	1.9	2.0
Total income tax expense	$ 9.2	$ 7.4	$ 8.1