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Segment Results Narrative (Details)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Segment Reporting [Abstract]    
Number of Reportable Segments 3 3
Revenue [Member] | Threshold for Reporting Customer Concentration [Member]    
Segment Reporting Information [Line Items]    
Concentration Risk, Percentage 10.00% 10.00%