Annual report pursuant to Section 13 and 15(d)

Commitments - Other Commitments Narrative (Details)

v3.6.0.2
Commitments - Other Commitments Narrative (Details) - USD ($)
$ in Thousands, shares in Millions
1 Months Ended
Feb. 28, 2017
Dec. 31, 2016
Dec. 13, 2016
Dec. 31, 2015
Vitruvian        
Business Combination, Separately Recognized Transactions [Line Items]        
Amount put in escrow     $ 185,000  
Vitruvian | Forecast        
Business Combination, Separately Recognized Transactions [Line Items]        
Consideration transferred, shares issuable (in shares) 23.9      
Purchase price for assets $ 1,400,000      
Muskie Proppant LLC | Supply agreement non-utilization fees        
Business Combination, Separately Recognized Transactions [Line Items]        
Accrued damages for non-utilization of supply contract obligations   $ 1,900   $ 300
Purchase commitments        
Business Combination, Separately Recognized Transactions [Line Items]        
2017   52,440    
2018   39,330    
Total   $ 91,770