Note 12 - Goodwill and Other Intangible Assets - Identifiable Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Finite-lived intangible assets, gross	$ 223.6	$ 185.0
Less accumulated amortization	(89.7)	(69.1)
Total identifiable intangible assets, net	133.9	115.9
Customer Relationships [Member]
Finite-lived intangible assets, gross	$ 206.3	169.0
Weighted average amortization period (Year)	10 years 8 months 12 days
Noncompete Agreements [Member]
Finite-lived intangible assets, gross	$ 10.8	9.6
Weighted average amortization period (Year)	6 years
Trade Names [Member]
Finite-lived intangible assets, gross	$ 6.5	$ 6.4
Weighted average amortization period (Year)	2 years 1 month 6 days