VAALCO Energy, Inc. Quarterly report pursuant to Section 13 or 15(d)

Derivatives And Fair Value (Effect Of Derivative Instruments On The Condensed Consolidated Statements Of Operations) (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016
Not Designated as Hedging Instrument [Member] \| Commodity Contract [Member] \| Other, net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (194)	$ (772)