|
Segment Information - Segment Activity (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
|
Jun. 30, 2014
|
Jun. 30, 2013
|
Jun. 30, 2014
|
Jun. 30, 2013
|
Dec. 31, 2013
|
|
| Segment Reporting Information [Line Items] | |||||
| Revenues | $ 52,098 | $ 29,118 | $ 80,172 | $ 73,255 | |
| Income (loss) from operations | 33,828 | 11,666 | 33,181 | 33,170 | |
| Total assets | 334,317 | 334,317 | 308,167 | ||
|
Operating Segments | Corporate and Other
|
|||||
| Segment Reporting Information [Line Items] | |||||
| Income (loss) from operations | (1,666) | (1,307) | (3,614) | (3,482) | |
| Total assets | 13,271 | 13,271 | 20,211 | ||
|
Operating Segments | Gabon
|
|||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 51,631 | 28,574 | 79,375 | 72,229 | |
| Income (loss) from operations | 36,223 | 14,853 | 38,913 | 45,717 | |
| Total assets | 287,352 | 287,352 | 256,033 | ||
|
Operating Segments | Angola
|
|||||
| Segment Reporting Information [Line Items] | |||||
| Income (loss) from operations | (721) | (379) | (1,847) | (1,582) | |
| Total assets | 13,777 | 13,777 | 12,204 | ||
|
Operating Segments | Equatorial Guinea
|
|||||
| Segment Reporting Information [Line Items] | |||||
| Income (loss) from operations | (139) | (165) | (339) | (455) | |
| Total assets | 10,103 | 10,103 | 10,059 | ||
|
Operating Segments | USA
|
|||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 467 | 544 | 797 | 1,026 | |
| Income (loss) from operations | 130 | (1,336) | 67 | (7,028) | |
| Total assets | $ 9,813 | $ 9,813 | $ 9,660 | ||