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ASSET RETIREMENT OBLIGATIONS (Details)
$ in Thousands
3 Months Ended
Mar. 31, 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 186
Accretion expense 100
Liability for asset retirement obligations at the end of the period $ 6,971