Quarterly report pursuant to Section 13 or 15(d)

Asset Retirement Obligations (Tables)

v3.8.0.1
Asset Retirement Obligations (Tables)
 3 Months Ended
Mar. 31, 2018
Asset Retirement Obligation [Abstract]  
Summary of Activity of Asset Retirement Obligations
The table below summarizes the activity for the Company’s asset retirement obligations:

Three Months Ended

March 31, 2018
Asset retirement obligations at January 1, 2018
$
6,020

Accretion expense
218

Liabilities incurred
44

Liabilities settled
(95
)
Revisions to estimate (a)
4,314

Asset retirement obligations at end of period
10,501

Less: Current asset retirement obligations
(2,784
)
Long-term asset retirement obligations at March 31, 2018
$
7,717


(a)
Revisions to estimated ARO obligations can result from changes in retirement cost estimates, revisions to estimated inflation rates and changes in the estimated timing of abandonment.