v3.19.1

ASSET RETIREMENT OBLIGATION (Tables)

12 Months Ended

Dec. 31, 2018

Asset Retirement Obligation Disclosure [Abstract]

Schedule of changes to asset retirement obligations

Following is a table of the changes to our asset retirement obligations for the following periods (in thousands):

		Year Ended December 31,
		2018				2017				2016
Asset retirement obligation, at beginning of period		$	21,476			$	19,976			$	22,951
Liabilities settled		(19		)		—				(3		)
Liabilities incurred		—				29				—
Changes in estimated obligations		—				(87		)		(4,740		)
Accretion of discount		1,668				1,558				1,768
Total asset retirement obligation, at end of period		$	23,125			$	21,476			$	19,976

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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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