XML 51 R35.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Asset Retirement Obligations (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2016
Asset Retirement Obligation [Abstract] |
Reconciliation of the company's asset retirement obligation | A reconciliation of the Company's liability, which is included in other accrued liabilities and deferred credits and other liabilities - other on the Consolidated Balance Sheets, for the years ended December 31 was as follows:
| 2016 |  | 2015 |
| (In thousands)
Balance at beginning of year | $ | 242,224 |  | $ | 27,211 |
Liabilities incurred | 15,114 |  | 2,751 |
Liabilities settled | (4,338 | ) | (1,708 | )
Accretion expense | 13,918 |  | 2,134 |
Revisions in estimates | 48,052 |  | 211,836 |
Balance at end of year | $ | 314,970 |  | $ | 242,224 |

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

X
- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859 + Details
Name: | us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration