Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Narrative) (Details)

v3.20.2
Commitments and Contingencies (Narrative) (Details)
$ in Thousands
 1 Months Ended 6 Months Ended
Jun. 30, 2020
USD ($)
Oct. 31, 2019
USD ($)
Jun. 30, 2020
USD ($)
$ / d
item
Dec. 31, 2019
USD ($)
Jul. 31, 2019
USD ($)
Jun. 30, 2019
USD ($)
Commitments And Contingencies [Line Items]            
Abandonment funding $ 11,420   $ 11,420 $ 11,371   $ 11,550
Number of drilled wells required by agreement | item     2      
Number of appraisal wells required by agreement | item     2      
Day rate of drilling rig contract | $ / d     75,000      
Etame Marine Block [Member]            
Commitments And Contingencies [Line Items]            
Estimated abandonment costs 19,200   $ 19,200      
Abandonment funding 11,400   11,400      
Loss contingency 4,400   $ 4,400   $ 4,400  
Payment of joint venture audit settlement 800 $ 1,100        
FPSO Charter [Member]            
Commitments And Contingencies [Line Items]            
Number of extensions | item     2      
Period of charter     1 year      
Guarantee liability 300   $ 300 $ 400    
Percentage of share in charter payment     31.10%      
Share in charter payment, approximate annual amount     $ 9,700      
Full Charter Payment [Member]            
Commitments And Contingencies [Line Items]            
Contractual obligation 39,500   39,500      
Contractual obligation 39,500   39,500      
Consortium [Member] | Etame Marine Block [Member]            
Commitments And Contingencies [Line Items]            
Estimated abandonment costs 61,800   61,800      
Abandonment funding 36,700   36,700      
Consortium [Member] | FPSO Charter [Member]            
Commitments And Contingencies [Line Items]            
Maximum exposure $ 39,500   $ 39,500