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ASSET RETIREMENT OBLIGATIONS (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2019
USD ($)
Activity related to ARO liability  
Liability for asset retirement obligations at the beginning of the period $ 6,914
Liabilities settled and divested (229)
Additions 354
Accretion expense 307
Revisions in estimated cash flows 2,807
Liability for asset retirement obligations at the end of the period $ 10,153