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Asset Retirement Obligations
 6 Months Ended
Jun. 30, 2019
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligations
Asset Retirement Obligations
The Company has asset retirement obligations associated with the future plugging and abandonment of oil and gas properties and related facilities. Revisions to the liability typically occur due to changes in the estimated abandonment costs, well economic lives, and the discount rate.
The following table summarizes the Company’s asset retirement obligation transactions recorded during the six months ended June 30, (in thousands): 
 
 
2019
Beginning asset retirement obligations
 
$
2,229

Liabilities incurred
 
23

Liabilities settled
 
(179
)
Accretion expense
 
108

Divestitures
 
—

Revision of estimates
 
—

Ending asset retirement obligations
 
$
2,181