Goodwill and Intangible Assets - Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Other
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 54,108	$ 53,616
Accumulated Amortization	(23,454)	(22,480)
Net Carrying Amount	30,654	31,136
Patents
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	10,680	10,199
Accumulated Amortization	(2,282)	(2,196)
Net Carrying Amount	8,398	8,003
Distribution agreements
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	5,626	5,376
Accumulated Amortization	(2,421)	(2,285)
Net Carrying Amount	3,205	3,091
License agreements and trademarks
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	8,869	8,995
Accumulated Amortization	(1,981)	(1,823)
Net Carrying Amount	6,888	7,172
Trademarks
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	7,253	7,298
Accumulated Amortization	(2,188)	(2,079)
Net Carrying Amount	5,065	5,219
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	1,029	1,029
Accumulated Amortization	(696)	(636)
Net Carrying Amount	333	393
Customer lists
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	20,384	20,452
Accumulated Amortization	(13,619)	(13,194)
Net Carrying Amount	6,765	7,258
Royalty agreements
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	267	267
Accumulated Amortization	(267)	(267)
Net Carrying Amount	$ 0	$ 0