Goodwill and Intangible Assets - Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Other
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 48,603	$ 47,805
Accumulated Amortization	(21,021)	(18,870)
Net Carrying Amount	27,582	28,935
Patents
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	10,108	9,302
Accumulated Amortization	(2,511)	(2,374)
Net Carrying Amount	7,597	6,928
Distribution agreements
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	5,176	5,176
Accumulated Amortization	(2,019)	(1,780)
Net Carrying Amount	3,157	3,396
License agreements and trademarks
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	3,783	3,783
Accumulated Amortization	(1,509)	(1,249)
Net Carrying Amount	2,274	2,534
Trademarks
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	7,619	7,622
Accumulated Amortization	(2,091)	(1,844)
Net Carrying Amount	5,528	5,778
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	1,029	1,029
Accumulated Amortization	(518)	(399)
Net Carrying Amount	511	630
Customer lists
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	20,621	20,626
Accumulated Amortization	(12,106)	(10,957)
Net Carrying Amount	8,515	9,669
Royalty agreements
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	267	267
Accumulated Amortization	(267)	(267)
Net Carrying Amount	$ 0	$ 0