Goodwill and Intangible Assets - Changes in Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Indefinite-lived Intangible Assets [Roll Forward]
Loss on impairment	$ (1,200)
Finite-lived Intangible Assets [Roll Forward]
Intangible assets net beginning balance		$ 56,017
Amortization		(3,096)	$ (2,930)	$ (2,833)
Loss on impairment	(700)	(1,924)	(113)	$ (16)
Intangible assets net ending balance	48,375	48,375	56,017
In-process research and development (IPR&D)
Indefinite-lived Intangible Assets [Roll Forward]
Indefinite intangible assets net beginning balance		3,629
Intangible assets placed in service		(1,346)
Loss on impairment		(1,201)
Foreign currency translation		(363)
Indefinite intangible assets net ending balance	719	719	3,629
Product Acquisition Costs
Finite-lived Intangible Assets [Roll Forward]
Intangible assets net beginning balance		14,682
Amortization		0
Intangible assets placed in service		0
Loss on impairment		(716)
Foreign currency translation		(658)
Intangible assets net ending balance	13,308	13,308	14,682
Trademarks and Technology
Finite-lived Intangible Assets [Roll Forward]
Intangible assets net beginning balance		34,696
Amortization		(2,727)
Intangible assets placed in service		1,346
Loss on impairment		(7)
Foreign currency translation		(1,378)
Intangible assets net ending balance	31,930	31,930	34,696
Customer Relationships
Finite-lived Intangible Assets [Roll Forward]
Intangible assets net beginning balance		3,010
Amortization		(369)
Intangible assets placed in service		0
Loss on impairment		0
Foreign currency translation		(223)
Intangible assets net ending balance	$ 2,418	$ 2,418	$ 3,010