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Description of Business (Details)
12 Months Ended
Dec. 31, 2017
segment
product_line
country
Concentration Risk [Line Items]  
Number of reportable segments | segment 2
Number of product lines | product_line 5
Number of countries where products are sold | country 56
US, Brazil and UK | Geographic Concentration Risk  
Concentration Risk [Line Items]  
Concentration risk, percentage 90.00%