XML 44 R32.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Asset Retirement Obligations (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2018
Asset Retirement Obligation Disclosure [Abstract] |
Asset Retirement Obligation | A reconciliation of our liability for plugging and abandonment costs for the three months ended March 31, 2018 is as follows (in thousands):
|  | Three Months Ended March 31, 2018 |
Beginning of period |  | $ | 276,855 |
Liabilities incurred |  |  | 1,258 |
Liabilities settled |  |  | (829 | )
Accretion expense |  |  | 4,247 |
Change in estimate |  |  | 3,805 |
End of period |  |  | 285,336 |
Less current portion |  |  | (6,327 | )
Long-term asset retirement obligations |  | $ | 279,009 |

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 Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + 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 + Details
Name: | us-gaap_ScheduleOfAssetRetirementObligationsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration