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Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2018

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Changes to the Company's Before-tax Asset Retirement Obligation

The following table indicates the changes to the company’s before-tax asset retirement obligations in 2018, 2017 and 2016:

	2018					2017				2016
Balance at January 1	$	14,214				$	14,243			$	15,642
Liabilities incurred	96					684				204
Liabilities settled	(830		)			(1,721		)		(1,658		)
Accretion expense	654					668				749
Revisions in estimated cash flows	(84		)			340				(694		)
Balance at December 31	$	14,050				$	14,214			$	14,243

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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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