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ASSET RETIREMENT OBLIGATIONS (Tables) | 6 Months Ended
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Jun. 30, 2018
ASSET RETIREMENT OBLIGATIONS |
Schedule of activity related to ARO liability | The Company recorded the following activity related to its ARO liability (in thousands):
Liability for asset retirement obligations as of December 31, 2017 |  | $ | 4,368 |
Liabilities settled and divested |  |  | (110 | )
Additions |  |  | 544 |
Acquisitions(1) |  |  | 2,333 |
Accretion expense |  |  | 131 |
Revisions in estimated cash flows |  |  | (720 | )
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Liability for asset retirement obligations as of June 30, 2018 |  | $ | 6,546 |
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(1) | See Note 3, "Acquisitions and Divestitures," for additional information on the Company's acquisition and divestiture activities.

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- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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