Intangible Assets - Intangibles (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Finite and Indefiite-Lived Intangible Assets [Line Items]
Total finite and indefinite-lived intangible assets, gross	$ 11,432		$ 11,432		$ 5,674
Accumulated amortization	(2,397)		(2,397)		(1,964)
Intangibles, net	9,035		9,035		3,710
Amortization of intangibles with finite lives	268	119	433	261
Tradename
Finite and Indefiite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	435		435		435
Finite-lived intangible assets, useful life (in years)			7 years
Patents and technological know-how
Finite and Indefiite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	5,310		5,310		2,070
Finite-lived intangible assets, useful life (in years)			10 years
Proprietary software
Finite and Indefiite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	5,449		5,449		2,961
Other
Finite and Indefiite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 238		$ 238		$ 208
Finite-lived intangible assets, useful life (in years)			5 years
Minimum
Finite and Indefiite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life (in years)			3 years
Maximum
Finite and Indefiite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life (in years)			15 years