XML 30 R12.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Asset Retirement Obligations | 12 Months Ended
--- | ---
Dec. 31, 2015
Asset Retirement Obligation [Abstract] |
Asset Retirement Obligations | 6. ASSET RETIREMENT OBLIGATIONS The following table summarizes the changes in our asset retirement obligations:
|  | Year Ended December 31, |  |  |  |  |  |  |
(in thousands) |  |  | 2015 |  |  | 2014 |  |  | 2013
Balance at January 1 |  | $ | 14,846 |  | $ | 11,464 |  | $ | 10,368
Accretion expense |  |  | 778 |  |  | 720 |  |  | 643
Additions |  |  | 1,085 |  |  | 2,526 |  |  | 453
Revisions |  |  | (543) |  |  | 136 |  |  | -
Balance at December 31 |  | $ | 16,166 |  | $ | 14,846 |  | $ | 11,464
We are required under the Etame PSC to conduct regular abandonment studies to update the estimated costs to abandon the offshore wells, platforms and facilities on the Etame Marin block. In January 2016, we completed a new abandonment study. The final results of the abandonment study resulted in an increase in the costs necessary to fund future abandonment obligations. During 2014, we added asset retirement obligations related to two new platforms and two wells on the Etame Marin block, based upon baseline costs from the prior study.

X
- References No definition available. + Details
Name: | us-gaap_AssetRetirementObligationDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7569-110849 + Details
Name: | us-gaap_AssetRetirementObligationDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration