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Decommissioning and Other Asset Retirement Obligations (Tables) | 6 Months Ended
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Jun. 30, 2017
Asset Retirement Obligation Disclosure [Abstract] |
Decommissioning and Other Asset Retirement Obligations Table |
| Three Months Ended June 30, 2017 |  | Six Months Ended June 30, 2017
| (In Thousands)
Beginning balance for the period, as reported | $ | 55,482 |  |  | $ | 55,478 |
Activity in the period: |  |  |
Accretion of liability | 551 |  |  | 1,031 |
Retirement obligations incurred | — |  |  | — |
Revisions in estimated cash flows | (2 | ) |  | (14 | )
Settlement of retirement obligations | (32 | ) |  | (496 | )
Ending balance | $ | 55,999 |  |  | $ | 55,999 |

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- 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
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