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Significant Accounting Policies (Details)
$ in Thousands, € in Millions
12 Months Ended
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2016
EUR (€)
Organization, Consolidation and Presentation of Financial Statements [Abstract]        
Guarantor Obligations, Term 1.5      
Guarantor Obligations, Maximum Exposure, Undiscounted $ 15,400     € 14.6
Shipping and Handling Revenue (8,683) $ (11,592) $ (8,855)  
Shipping, Handling and Transportation Costs 12,233 15,245 15,913  
Advertising Expense 4,702 5,074 3,914  
Research and Development Expense $ 18,097 15,842 $ 15,588  
Unamortized Debt Issuance Expense   $ 1,836