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Segments - Narrative (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2017
USD ($)
Segment
Dec. 31, 2016
Segment Reporting Information [Line Items]      
Number of reportable segments | Segment   2  
Customer Concentration Risk | Sales Revenue, Net      
Segment Reporting Information [Line Items]      
Concentration percentage 10.00%    
Intersegment Elimination      
Segment Reporting Information [Line Items]      
Inter-segment sales   $ 0  
Inter-segment allocation of interest expense   $ 0  
Customer 1 | Customer Concentration Risk | Sales Revenue, Net      
Segment Reporting Information [Line Items]      
Concentration percentage   10.00%  
Customer 1 | Customer Concentration Risk | Accounts Receivable      
Segment Reporting Information [Line Items]      
Concentration percentage     10.00%