Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Schedule of Assets Acquired and Liabilities Assumed Chieftrain Sand and Proppant LLC (Details)

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Acquisitions - Schedule of Assets Acquired and Liabilities Assumed Chieftrain Sand and Proppant LLC (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
May 24, 2017
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Business Acquisition [Line Items]          
Bargain purchase gain, net of tax   $ 0 $ (4,012) $ 0 $ (4,012)
Chieftain Acquisition          
Business Acquisition [Line Items]          
Property, plant and equipment $ 23,373        
Sand reserves 20,910        
Total assets acquired 44,283        
Asset retirement obligation 1,732        
Total liabilities assumed 1,732        
Net assets acquired 42,551        
Bargain purchase gain, net of tax (6,231)        
Total purchase price 36,320        
Bargain purchase, gain recognized, tax amount $ 2,200