Commitments And Contingencies (Estimated Obligations And Companies Share For The Annual Charter Payment) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2016
Estimated obligation and company share for annual charter payment
Annual charter payment, Total		$ 5,100
VAALCO ENERGY, INC. [Member]
Estimated obligation and company share for annual charter payment
Annual charter payment, 2018	$ 9,719
Annual charter payment, 2019	9,719
Annual charter payment, 2020	7,029
Annual charter payment, Total	26,467
Full Charter Payment [Member]
Estimated obligation and company share for annual charter payment
Annual charter payment, 2018	31,294
Annual charter payment, 2019	31,294
Annual charter payment, 2020	22,634
Annual charter payment, Total	$ 85,222