Note 4 - Goodwill and Other Intangible Assets - Details of Other Intangible Assets and Related Future Amortization Expense (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Finite-lived intangible assets, gross	$ 560,080
Finite-lived intangible assets, accumulated amortization	170,028
Finite-lived intangible assets, Net Book Value	390,052
Finite-lived Intangible Assets Acquired	$ 212,720
Patents, Licenses, and Software [Member]
Finite-Lived Intangible Asset, Useful Life	10 years 219 days
Finite-lived intangible assets, gross	$ 192,326
Finite-lived intangible assets, accumulated amortization	67,528
Finite-lived intangible assets, Net Book Value	$ 124,798
Finite-lived intangible assets, useful life (Year)	8 years
Finite-lived Intangible Assets Acquired	$ 51,500
Distribution Rights [Member]
Finite-Lived Intangible Asset, Useful Life	12 years 219 days
Finite-lived intangible assets, gross	$ 44,001
Finite-lived intangible assets, accumulated amortization	33,567
Finite-lived intangible assets, Net Book Value	$ 10,434
Customer Lists, Trademarks, and Trade Names [Member]
Finite-Lived Intangible Asset, Useful Life	18 years 36 days
Finite-lived intangible assets, gross	$ 311,333
Finite-lived intangible assets, accumulated amortization	63,326
Finite-lived intangible assets, Net Book Value	$ 248,007
Finite-lived intangible assets, useful life (Year)	17 years 73 days
Finite-lived Intangible Assets Acquired	$ 148,800
Order or Production Backlog [Member]
Finite-Lived Intangible Asset, Useful Life	1 year
Finite-lived intangible assets, gross	$ 12,420
Finite-lived intangible assets, accumulated amortization	5,607
Finite-lived intangible assets, Net Book Value	$ 6,813
Finite-lived intangible assets, useful life (Year)	1 year
Finite-lived Intangible Assets Acquired	$ 12,420