Annual report pursuant to Section 13 and 15(d)

Organization and Basis of Presentation - Narrative (Details)

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Organization and Basis of Presentation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
Jul. 30, 2018
Jun. 29, 2018
Jun. 05, 2017
Oct. 19, 2016
Nov. 24, 2014
Business Acquisition [Line Items]          
Shares issued (in shares) 385,000        
Sale of stock, price per share (in USD per share)   $ 38.01      
Operating Entities          
Business Acquisition [Line Items]          
Shares issued in acquisition         20,000,000
Sturgeon LLC and Stingray Acquisition          
Business Acquisition [Line Items]          
Shares issued in acquisition     7,000,000    
IPO          
Business Acquisition [Line Items]          
Shares issued (in shares)       7,750,000  
Sale of stock, price per share (in USD per share)       $ 15.00  
Proceeds from initial public offering       $ 103.1  
IPO | Mammoth Holdings, Gulfport and Rhino          
Business Acquisition [Line Items]          
Shares issued (in shares)       250,000  
Over-Allotment Option          
Business Acquisition [Line Items]          
Shares issued (in shares)   600,000   7,500,000  
Secondary Public Offering          
Business Acquisition [Line Items]          
Shares issued (in shares)   4,000,000