XML 28 R16.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Asset Retirement Obligations | 9 Months Ended
--- | ---
Sep. 30, 2017
Asset Retirement Obligation Disclosure [Abstract] |
Asset Retirement Obligations | Asset Retirement Obligations The following table reflects the changes in the Company’s ARO during the nine months ended September 30, 2017:
| (In thousands)
Balance at December 31, 2016 | $ | 49,687 |
Liabilities incurred during period | 1,333 |
Liabilities settled during period | (103 | )
Accretion expense during period(1) | 1,998 |
Revisions to estimates | (215 | )
Balance at September 30, 2017 | $ | 52,700 |
___________________
(1) | Included in depreciation, depletion and amortization on the Company’s Condensed Consolidated Statements of Operations.
At September 30, 2017, the current portion of the total ARO balance was approximately $0.3 million and was included in accrued liabilities on the Company’s Condensed Consolidated Balance Sheet.

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 -URI http://asc.fasb.org/subtopic&trid=2175671 + Details
Name: | us-gaap_AssetRetirementObligationDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration