Quarterly report pursuant to Section 13 or 15(d)

JV Drilling Program - Additional Information (Details)

v3.10.0.1
JV Drilling Program - Additional Information (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 12, 2018
DrillingProject
UndevelopedDrillingProject
Jun. 30, 2018
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
Oil And Gas In Process Activities [Line Items]            
Oil and natural gas properties   $ 576,073   $ 576,073   $ 579,016
Other assets   69,418   69,418   $ 60,393
Total revenues   149,612 $ 123,323 283,825 $ 247,716  
Other expense   (125) $ (5,168) 208 $ (5,114)  
Monza Energy LLC            
Oil And Gas In Process Activities [Line Items]            
Oil and natural gas properties   6,000   6,000    
Other assets   2,300   2,300    
Reduction in working capital       1,700    
Total revenues       500    
Operating expense       400    
Other expense       200    
Maximum exposure amount by related party   48,800   48,800    
JV Drilling Program            
Oil And Gas In Process Activities [Line Items]            
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   $ 89,400   89,400    
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