XML 38 R25.htm IDEA: XBRL DOCUMENT v3.5.0.2
Business Combinations (Details) - USD ($)
$ in Thousands
1 Months Ended 9 Months Ended
Aug. 31, 2016
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Business Acquisition [Line Items]        
Business acquisitions, net of cash acquired   $ (3,761) $ 0  
Goodwill   $ 20,216   $ 19,009
Pragmatic Drilling Fluids Additives, Ltd        
Business Acquisition [Line Items]        
Business combination, consideration transferred $ 4,500      
Business combination, additional consideration 700      
Finite-lived intangible assets acquired 1,700      
Goodwill $ 1,700