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Goodwill and Intangible Assets - Other Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Other
    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross $ 48,205 $ 47,805
Accumulated Amortization (19,938) (18,870)
Net Carrying Amount 28,267 28,935
Patents
    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 9,702 9,302
Accumulated Amortization (2,430) (2,374)
Net Carrying Amount 7,272 6,928
Distribution agreements
    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 5,176 5,176
Accumulated Amortization (1,900) (1,780)
Net Carrying Amount 3,276 3,396
License agreements and trademarks
    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 3,783 3,783
Accumulated Amortization (1,360) (1,249)
Net Carrying Amount 2,423 2,534
Trademarks
    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 7,622 7,622
Accumulated Amortization (1,968) (1,844)
Net Carrying Amount 5,654 5,778
Non-compete agreements
    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 1,029 1,029
Accumulated Amortization (458) (399)
Net Carrying Amount 571 630
Customer lists
    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 20,626 20,626
Accumulated Amortization (11,555) (10,957)
Net Carrying Amount 9,071 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