Annual report pursuant to Section 13 and 15(d)

Quarterly Financial Information (Unaudited) (Detail)

v2.4.0.8
Quarterly Financial Information (Unaudited) (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Quarterly Financial Information [Line Items]                      
Revenues $ 58,282 $ 37,740 $ 29,118 $ 44,137 $ 53,553 $ 37,630 $ 58,818 $ 45,286 $ 169,277 $ 195,287 $ 210,436
Total operating costs and expenses 22,331 29,636 17,452 22,634 51,292 22,036 20,186 15,180 92,052 108,694 77,875
Operating income 35,951 8,104 11,666 21,503 2,261 15,594 38,632 30,106 77,225 86,593 132,561
Net income 26,377 2,386 7,121 7,188 (18,917) 1,412 12,317 10,527 43,072 5,339 40,562
Basic net income per share $ 0.46 $ 0.4 $ 0.12 $ 0.12 $ (0.33)   $ 0.18 $ 0.16 $ 0.75 $ 0.01 $ 0.60
Diluted net income per share $ 0.46 $ 0.4 $ 0.12 $ 0.12 $ (0.32)   $ 0.18 $ 0.15 $ 0.74 $ 0.01 $ 0.59
Less net income attributable to noncontrolling interest           (1,306) (1,893) (1,509)   (4,708) (6,417)
Net income attributable to VAALCO Energy, Inc.         $ (18,917) $ 106 $ 10,424 $ 9,018 $ 43,072 $ 631 $ 34,145