Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Schedule of Assets Acquired and Liabilities Assumed, RTS (Details)

v3.19.2
Acquisitions - Schedule of Assets Acquired and Liabilities Assumed, RTS (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Jun. 15, 2018
Dec. 31, 2017
Business Acquisition [Line Items]        
Goodwill $ 101,245 $ 101,245   $ 99,811
RTS Energy Services LLC        
Business Acquisition [Line Items]        
Inventory     $ 180  
Property, plant and equipment     7,787  
Goodwill     133  
Total assets acquired     $ 8,100