XML 70 R91.htm IDEA: XBRL DOCUMENT v3.20.1
Segment Reporting - Additional Information (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
Segment
Product
Dec. 31, 2019
USD ($)
Segment Reporting Information    
Number of reportable segments | Segment 2  
Number of product types (over 400) | Product 400  
Goodwill $ 185,649 $ 273,524
Operating Segments | Oil & Gas Proppants    
Segment Reporting Information    
Goodwill 0 86,100
Operating Segments | Industrial & Specialty Products    
Segment Reporting Information    
Goodwill $ 185,600 $ 187,400