Annual report pursuant to Section 13 and 15(d)

Leases (Details)

v3.19.3.a.u2
Leases (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2019
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Lessee, Lease, Description [Line Items]          
Operating Lease, Payments     $ 659    
Operating Lease, Cost     773    
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability $ 800 $ 2,500 3,325    
Lease, Cost     27,383    
Short-term Lease, Cost     36,202    
Variable Lease, Cost     23,762    
Amounts charged as dilling costs     (33,354)    
Operating Lease, Liability, Current 847   847 $ 0  
Operating Lease, Liability, Noncurrent $ 2,232   $ 2,232 0  
Operating Lease, Weighted Average Remaining Lease Term 4 years 1 month 6 days   4 years 1 month 6 days    
Operating Lease, Weighted Average Discount Rate, Percent 5.97%   5.97%    
Lessee, Operating Lease, Liability, Payments, Due Year Two $ 847   $ 847    
Lessee, Operating Lease, Liability, Payments, Due Year Three 830   830    
Lessee, Operating Lease, Liability, Payments, Due Year Four 834   834    
Lessee, Operating Lease, Liability, Payments, Due Year Five 833   833    
Lessee, Operating Lease, Liability, Payments, Due after Year Five 139   139    
Lessee, Operating Lease, Liability, Payments, Due 3,483   3,483    
Lessee, Operating Lease, Liability, Undiscounted Excess Amount (404)   (404)    
Operating Lease, Right-of-Use Asset 2,740 2,500 2,740 0  
Operating Lease, Liability $ 3,079 $ 2,800 3,079    
Operating Leases, Rent Expense, Net       $ 2,700 $ 1,000
Natural Gas, Gathering, Transportation, Marketing and Processing [Member]          
Lessee, Lease, Description [Line Items]          
Lease, Cost     12,100    
Operating Expense [Member]          
Lessee, Lease, Description [Line Items]          
Lease, Cost     14,500    
General and Administrative Expense [Member]          
Lessee, Lease, Description [Line Items]          
Lease, Cost     $ 800