Quarterly report pursuant to Section 13 or 15(d)

Drilling Program Joint Venture - Additional Information (Details)

v3.10.0.1
Drilling Program Joint Venture - Additional Information (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
Mar. 12, 2018
DrillingProject
UndevelopedDrillingProject
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
Oil And Gas In Process Activities [Line Items]            
Oil and natural gas properties   $ 522,781   $ 522,781   $ 579,016
Other assets   69,014   69,014   $ 60,393
Total revenues   153,459 $ 110,281 437,284 $ 357,997  
Other expense   885 $ 41 1,093 $ (5,073)  
Monza Energy LLC            
Oil And Gas In Process Activities [Line Items]            
Oil and natural gas properties   7,500   7,500    
Other assets   2,200   2,200    
Increase in working capital       2,600    
Total revenues       2,200    
Operating expense       1,100    
Other expense       300    
Maximum exposure amount by related party   53,500   53,500    
JV Drilling Program            
Oil And Gas In Process Activities [Line Items]            
Percentage of revenue less expenses from joint venture 20.00%          
Capital expenditures reimbursement, net   $ 20,000   $ 20,000    
JV Drilling Program | Mr. Tracy W. Krohn            
Oil And Gas In Process Activities [Line Items]            
Minority interest ownership percentage by joint venture   4.50%   4.50%    
JV Drilling Program | Monza Energy LLC            
Oil And Gas In Process Activities [Line Items]            
Joint venture maturity period 3 years          
Joint venture ownership percentage contributed to related party 88.94%          
Joint venture ownership percentage 11.06%          
Number of undeveloped drilling project substituted | UndevelopedDrillingProject 1          
Undeveloped drilling project, joint venture ownership percentage contributed to related party 58.71%          
Undeveloped drilling project, joint venture ownership percentage 41.29%          
Commitment amount by investors       $ 361,400    
Percentage of revenue less expenses from joint venture 30.00%          
Percentage of estimated well cost 20.00%          
Capital contribution payments from members of Monza   $ 114,700   114,700    
JV Drilling Program | Monza Energy LLC | Mr. Tracy W. Krohn            
Oil And Gas In Process Activities [Line Items]            
Capital commitment   $ 14,500   $ 14,500    
JV Drilling Program | Monza Energy LLC | Maximum            
Oil And Gas In Process Activities [Line Items]            
Number of drilling projects | DrillingProject 14