|
Segment Information - Segment Activity (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
|
Sep. 30, 2013
|
Sep. 30, 2012
|
Sep. 30, 2013
|
Sep. 30, 2012
|
Dec. 31, 2012
|
|
| Segment Reporting Information [Line Items] | |||||
| Revenues | $ 37,740 | $ 37,630 | $ 110,995 | $ 141,734 | |
| Operating income (loss) | 8,104 | 15,594 | 41,274 | 84,333 | |
| Total assets | 273,621 | 273,621 | 267,956 | ||
|
Operating Segments | Corporate and Other
|
|||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | |||||
| Operating income (loss) | (611) | (1,879) | (4,091) | (6,940) | |
| Total assets | 21,127 | 21,127 | 38,585 | ||
|
Operating Segments | Gabon
|
|||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 37,253 | 36,950 | 109,482 | 139,563 | |
| Operating income (loss) | 14,156 | 27,248 | 59,871 | 106,852 | |
| Total assets | 220,098 | 220,098 | 190,652 | ||
|
Operating Segments | Angola
|
|||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | |||||
| Operating income (loss) | (538) | (781) | (2,120) | (1,980) | |
| Total assets | 12,574 | 12,574 | 11,405 | ||
|
Operating Segments | Equatorial Guinea
|
|||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | |||||
| Operating income (loss) | (149) | (604) | |||
| Total assets | 10,129 | 10,129 | 10,000 | ||
|
Operating Segments | USA
|
|||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 487 | 680 | 1,513 | 2,171 | |
| Operating income (loss) | (4,754) | (8,994) | (11,782) | (13,599) | |
| Total assets | $ 9,693 | $ 9,693 | $ 17,314 | ||