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Intangible Assets - Intangibles (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 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 (2,665)   (2,665)   (1,964)
Intangibles, net 8,767   8,767   3,710
Amortization of intangibles with finite lives 268 142 701 404  
Tradename
          
Finite and Indefiite-Lived Intangible Assets [Line Items]          
Finite-lived intangible assets, useful life (in years)     7 years    
Finite-Lived Intangible Assets, Gross 435   435   435
Patents and technological know-how
          
Finite and Indefiite-Lived Intangible Assets [Line Items]          
Finite-lived intangible assets, useful life (in years)     10 years    
Finite-Lived Intangible Assets, Gross 5,310   5,310   2,070
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, useful life (in years)     5 years    
Finite-Lived Intangible Assets, Gross $ 238   $ 238   $ 208
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