Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Narrative) (Details)

v3.22.0.1
Commitments and Contingencies (Narrative) (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended
Jan. 28, 2022
$ / shares
Aug. 31, 2020
USD ($)
km²
Jun. 30, 2020
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
$ / Boe
item
bbl
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Sep. 30, 2022
USD ($)
Nov. 03, 2021
$ / shares
Commitments And Contingencies [Line Items]                  
Abandonment funding         $ 21,808 $ 12,453      
Foreign currency gain on abandonment funding         (1,600) 1,100      
Agreement prepayment         (1,176)        
Dividends Payable, Amount Per Share | $ / shares                 $ 0.0325
Etame Marine Block [Member]                  
Commitments And Contingencies [Line Items]                  
Estimated abandonment costs         47,800        
Abandonment funding         $ 21,800        
Payment of joint venture audit settlement     $ 800            
Area of three-dimensional seismic data | km²   1,000              
Etame Marine Block [Member] | Minimum [Member]                  
Commitments And Contingencies [Line Items]                  
Expected cost of data acquisition   $ 2,200              
Etame Marine Block [Member] | Maximum [Member]                  
Commitments And Contingencies [Line Items]                  
Expected cost of data acquisition   $ 3,400              
FPSO Charter [Member]                  
Commitments And Contingencies [Line Items]                  
Number of extensions | item         2        
Period of charter         1 year        
Guarantee liability         $ 100 400      
Percentage of share in charter payment         58.80%        
Share in charter payment, approximate annual amount         $ 19,400        
Charter fee for production up to 20,000 BOPD | $ / Boe         0.93        
Charter fee amount threshold | bbl         20,000        
Charter fee for those bbls produced in excess of 20,000 BOPD | $ / Boe         2.50        
Company's share of charter expense         $ 22,100 $ 13,100 $ 12,100    
FSO Agreement [Member]                  
Commitments And Contingencies [Line Items]                  
Agreement prepayment         1,200        
Agreement prepayment, recoverable amount         6,000        
FSO Agreement [Member] | Minimum [Member]                  
Commitments And Contingencies [Line Items]                  
Estimated field level capital conversion         26,000        
FSO Agreement [Member] | Maximum [Member]                  
Commitments And Contingencies [Line Items]                  
Estimated field level capital conversion         32,000        
Consortium [Member] | Etame Marine Block [Member]                  
Commitments And Contingencies [Line Items]                  
Estimated abandonment costs         81,300        
Abandonment funding         37,100        
Consortium [Member] | FSO Agreement [Member]                  
Commitments And Contingencies [Line Items]                  
Agreement prepayment         2,000        
Consortium [Member] | FSO Agreement [Member] | Minimum [Member]                  
Commitments And Contingencies [Line Items]                  
Estimated field level capital conversion         40,000        
Consortium [Member] | FSO Agreement [Member] | Maximum [Member]                  
Commitments And Contingencies [Line Items]                  
Estimated field level capital conversion         $ 50,000        
Scenario, Forecast [Member] | FPSO Charter [Member]                  
Commitments And Contingencies [Line Items]                  
Guarantee liability               $ 14,200  
Scenario, Forecast [Member] | FSO Agreement [Member]                  
Commitments And Contingencies [Line Items]                  
Agreement prepayment       $ 3,200          
Scenario, Forecast [Member] | Consortium [Member] | FPSO Charter [Member]                  
Commitments And Contingencies [Line Items]                  
Guarantee liability               $ 24,200  
Scenario, Forecast [Member] | Consortium [Member] | FSO Agreement [Member]                  
Commitments And Contingencies [Line Items]                  
Agreement prepayment       $ 5,000          
Subsequent Event [Member]                  
Commitments And Contingencies [Line Items]                  
Dividends Payable, Amount Per Share | $ / shares $ 0.0325                
Dividends Payable, Date Declared Jan. 28, 2022                
Dividends Payable, Date to be Paid Mar. 18, 2022                
Dividends Payable, Date of Record Feb. 18, 2022