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Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2018

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:

	2018			2017
	(In thousands)
Balance at beginning of year	$	341,969		$	314,970
Liabilities incurred	13,424			15,110
Liabilities acquired	1,002			—
Liabilities settled	(3,699		)	(4,981		)
Accretion expense*	18,242			16,839
Revisions in estimates	4,615			31
Balance at end of year	$	375,553		$	341,969

* Includes $16.8 million and $15.6 million in 2018 and 2017, respectively, related to regulatory assets.

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- References

No definition available.

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

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