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Business Segment Data (Details)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Business Segment Data (Details) [Line Items]    
Number of Reportable Segments 2  
Concentration Risk, Percentage 10.00% 12.50%
Sales Revenue, Net [Member] | Foreign [Member]    
Business Segment Data (Details) [Line Items]    
Concentration Risk, Percentage 10.00%