Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 223,348	$ 221,662
Accumulated Amortization	(95,730)	(89,317)
Net Carrying Amount	$ 127,618	132,345
License agreements
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives (Years)	10 years 2 months 12 days
Gross Carrying Amount	$ 4,478	4,497
Accumulated Amortization	(3,707)	(3,623)
Net Carrying Amount	$ 771	874
Leases
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives (Years)	2 years 6 months
Gross Carrying Amount	$ 796	796
Accumulated Amortization	(578)	(534)
Net Carrying Amount	$ 218	262
Trademarks
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives (Years)	9 years 10 months 25 days
Gross Carrying Amount	$ 15,505	15,464
Accumulated Amortization	(6,819)	(6,184)
Net Carrying Amount	$ 8,686	9,280
Non-competes
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives (Years)	4 years 9 months 18 days
Gross Carrying Amount	$ 2,294	1,197
Accumulated Amortization	(1,097)	(1,048)
Net Carrying Amount	$ 1,197	149
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives (Years)	9 years 4 months 24 days
Gross Carrying Amount	$ 161,534	160,423
Accumulated Amortization	(62,279)	(56,907)
Net Carrying Amount	$ 99,255	103,516
Patents and acquired technology
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives (Years)	6 years
Gross Carrying Amount	$ 38,741	39,285
Accumulated Amortization	(21,250)	(21,021)
Net Carrying Amount	17,491	18,264
Hebna | Non-competes
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 1,100
Hebna | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount		$ 1,300