Goodwill and Intangible Assets - Net Carrying Amount (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life (years)	15 years
Gross Carrying Amount	$ 172,000	$ 113,600
Accumulated Amortization and Reserves	(49,000)	(36,600)
Net Carrying Amount	$ 123,000	77,015	$ 90,068
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life (years)	14 years
Gross Carrying Amount	$ 49,600	45,500
Accumulated Amortization and Reserves	(7,600)	(3,600)
Net Carrying Amount	$ 42,000	41,900
Distribution agreements
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life (years)	20 years
Gross Carrying Amount	$ 66,300	25,200
Accumulated Amortization and Reserves	(10,900)	(8,000)
Net Carrying Amount	$ 55,400	17,200
Technology related assets
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life (years)	8 years
Gross Carrying Amount	$ 28,700	18,000
Accumulated Amortization and Reserves	(13,000)	(10,300)
Net Carrying Amount	$ 15,700	7,700
Patents, trademarks and copyrights
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life (years)	13 years
Gross Carrying Amount	$ 19,200	17,000
Accumulated Amortization and Reserves	(9,700)	(7,100)
Net Carrying Amount	$ 9,500	9,900
License agreements
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life (years)	5 years
Gross Carrying Amount	$ 5,300	5,300
Accumulated Amortization and Reserves	(5,300)	(5,300)
Net Carrying Amount	$ 0	0
Other
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life (years)	2 years
Gross Carrying Amount	$ 2,900	2,600
Accumulated Amortization and Reserves	(2,500)	(2,300)
Net Carrying Amount	$ 400	$ 300