Goodwill and Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 83,635		$ 77,387
Accumulated Amortization	(31,459)	$ (30,048)	(30,048)
Net Carrying Amount	52,176	$ 47,339	47,339
Patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	14,780		14,130
Accumulated Amortization	(3,288)		(3,165)
Net Carrying Amount	11,492		10,965
Distribution agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,626		6,626
Accumulated Amortization	(3,770)		(3,527)
Net Carrying Amount	2,856		3,099
License agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	20,745		20,695
Accumulated Amortization	(3,745)		(3,422)
Net Carrying Amount	17,000		17,273
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,786		12,380
Accumulated Amortization	(3,658)		(3,330)
Net Carrying Amount	13,128		9,050
Covenants not to compete
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,028		1,028
Accumulated Amortization	(944)		(936)
Net Carrying Amount	84		92
Customer lists
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	23,670		22,261
Accumulated Amortization	(16,054)		(15,401)
Net Carrying Amount	$ 7,616		6,860
Royalty agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount			267
Accumulated Amortization			(267)
Net Carrying Amount			$ 0