XML 22 R12.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Asset Retirement Obligations | 9 Months Ended
--- | ---
Sep. 30, 2018
Asset Retirement Obligation Disclosure [Abstract] |
Asset Retirement Obligations | Asset Retirement Obligations Activity related to the Company’s asset retirement obligations is as follows:
(In thousands) |  | Nine Months Ended September 30, 2018
Balance at beginning of period(1) |  | $ | 48,553 |
Liabilities incurred |  | 3,592 |
Liabilities settled |  | (1,025 | )
Liabilities divested |  | (3,782 | )
Accretion expense |  | 1,867 |
Balance at end of period(2) |  | $ | 49,205 |
_______________________________________________________________________________
(1) | Includes $5.0 million of current asset retirement obligations included in accrued liabilities at December 31, 2017.
(2) | Includes $1.0 million of current asset retirement obligations included in accrued liabilities at September 30, 2018.

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://fasb.org/us-gaap/role/ref/legacyRef -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