Note 12 - Goodwill and Other Intangible Assets - Identifiable Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Finite-lived intangible assets, gross	$ 185.0	$ 141.4
Less accumulated amortization	(69.1)	(50.8)
Total identifiable intangible assets, net	115.9	90.6
Customer Relationships [Member]
Finite-lived intangible assets, gross	$ 169.0	129.9
Weighted average amortization period (Year)	10 years 9 months 18 days
Noncompete Agreements [Member]
Finite-lived intangible assets, gross	$ 9.6	7.3
Weighted average amortization period (Year)	6 years 3 months 18 days
Trade Names [Member]
Finite-lived intangible assets, gross	$ 6.4	$ 4.2
Weighted average amortization period (Year)	2 years 1 month 6 days