Annual report pursuant to Section 13 and 15(d)

Schedule I - Parent Company Financial Statement (Condensed Unconsolidated Balance Sheet - Additional Information) (Details)

v3.6.0.2
Schedule I - Parent Company Financial Statement (Condensed Unconsolidated Balance Sheet - Additional Information) (Details) - $ / shares
Dec. 31, 2016
Dec. 31, 2015
Preferred Stock, Shares Issued 0 0
Preferred Stock, Shares Authorized 500,000 500,000
Preferred Stock, Par or Stated Value Per Share $ 25 $ 25
Common stock, par value $ 0.10 $ 0.10
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 66,109,565 66,041,338
Treasury stock, shares 7,555,095 7,514,169
VAALCO ENERGY, INC.    
Preferred Stock, Shares Issued 0 0
Preferred Stock, Shares Authorized 500,000 500,000
Preferred Stock, Par or Stated Value Per Share $ 25 $ 25
Common stock, par value $ 0.10 $ 0.10
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 66,109,565 66,041,338
Treasury stock, shares 7,555,095 7,514,169