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Commitments And Contingencies (Estimated Obligations And Companies Share For The Annual Charter Payment) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Jun. 30, 2016
Estimated obligation and company share for annual charter payment    
Annual charter payment, Total   $ 5,100
VAALCO ENERGY, INC.    
Estimated obligation and company share for annual charter payment    
Annual charter payment, 2019 $ 9,718  
Annual charter payment, 2020 7,029  
Annual charter payment, 2021  
Annual charter payment, 2022  
Annual charter payment, 2023  
Annual charter payment, Total 16,747  
Full Charter Payment [Member]    
Estimated obligation and company share for annual charter payment    
Annual charter payment, 2019 31,294  
Annual charter payment, 2020 22,634  
Annual charter payment, 2021  
Annual charter payment, 2022  
Annual charter payment, 2023  
Annual charter payment, Total $ 53,928