Goodwill and Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 90,692		$ 77,387
Accumulated Amortization	(34,985)	$ (30,048)	(30,048)
Net Carrying Amount	55,707	$ 47,339	47,339
Patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	15,972		14,130
Accumulated Amortization	(3,586)		(3,165)
Net Carrying Amount	12,386		10,965
Distribution agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,626		6,626
Accumulated Amortization	(4,248)		(3,527)
Net Carrying Amount	2,378		3,099
License agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	23,804		20,695
Accumulated Amortization	(4,387)		(3,422)
Net Carrying Amount	19,417		17,273
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,220		12,380
Accumulated Amortization	(4,342)		(3,330)
Net Carrying Amount	11,878		9,050
Covenants not to compete
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,028		1,028
Accumulated Amortization	(961)		(936)
Net Carrying Amount	67		92
Customer lists
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	25,942		22,261
Accumulated Amortization	(17,461)		(15,401)
Net Carrying Amount	8,481		6,860
In-process technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,100
Accumulated Amortization	0
Net Carrying Amount	$ 1,100
Royalty agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount			267
Accumulated Amortization			(267)
Net Carrying Amount			$ 0