Quarterly report pursuant to Section 13 or 15(d)

Segments - Narrative (Details)

v3.10.0.1
Segments - Narrative (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Jun. 30, 2018
Jun. 30, 2018
USD ($)
Segment
Jun. 30, 2017
Segment Reporting Information [Line Items]          
Number of reportable segments | Segment       2  
Customer Concentration Risk | Accounts Receivable          
Segment Reporting Information [Line Items]          
Concentration percentage 2.60% 3.20%      
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%   10.00%
Customer 1 | Customer Concentration Risk | Accounts Receivable          
Segment Reporting Information [Line Items]          
Concentration percentage       10.00%  
Customer 2 | Customer Concentration Risk | Sales Revenue, Net          
Segment Reporting Information [Line Items]          
Concentration percentage       10.00%