Annual report pursuant to Section 13 and 15(d)

Mobile Bay Transaction (Details)

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Mobile Bay Transaction (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
May 19, 2021
Assets $ 1,193,207 $ 940,582    
Cash and cash equivalents 245,799 43,726 $ 32,433  
Oil and natural gas properties and other, net 665,252 686,878    
Current portion of long-term debt 42,960      
Asset retirement obligations 56,419 17,188    
Asset retirement obligations, less current portion 368,076 375,516    
Total revenues 558,010 346,634 534,896  
Derivative loss (gain) 175,313 (23,808) 59,887  
Interest expense, net 70,049 $ 61,463 $ 59,569  
Term Loan [Member]        
Debt Instrument, Face Amount       $ 215,000
Current portion of long-term debt 43,000      
Special Purpose Vehicles, A-I LLC And A-II LLC [Member]        
Cash and cash equivalents 38,900      
Oil and natural gas properties and other, net 272,700      
Current portion of long-term debt 43,000      
Asset retirement obligations 54,500      
Asset retirement obligations, less current portion 140,400      
Total revenues 119,600      
Operating Costs and Expenses, Total 32,700      
Derivative loss (gain) 104,500      
Interest expense, net $ 9,800      
Special Purpose Vehicles, A-I LLC And A-II LLC [Member] | Term Loan [Member]        
Debt Instrument, Face Amount       $ 215,000