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ASSET RETIREMENT OBLIGATIONS (Tables) | 12 Months Ended
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Dec. 31, 2018
ASSET RETIREMENT OBLIGATIONS |
Schedule of activity related to ARO liability | The Company recorded the following activity related to its ARO liability (inclusive of the current portion) (in thousands):
Liability for asset retirement obligations as of December 31, 2016 |  | $ | 32,375
Liabilities settled and divested (1) |  |  | (33,796)
Additions |  |  | 592
Acquisitions (1) |  |  | 3,109
Accretion expense |  |  | 1,306
Revisions in estimated cash flows |  |  | 782
Liability for asset retirement obligations as of December 31, 2017 |  | $ | 4,368
Liabilities settled and divested (1) |  |  | (590)
Additions |  |  | 988
Acquisitions (1) |  |  | 2,465
Accretion expense |  |  | 329
Revisions in estimated cash flows |  |  | (646)
Liability for asset retirement obligations as of December 31, 2018 |  | $ | 6,914
(1) See Note 5, “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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