Annual report pursuant to Section 13 and 15(d)

Asset Retirement Obligations (Tables)

v3.8.0.1
Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2017
Asset Retirement Obligation [Abstract]  
Schedule of Change in Asset Retirement Obligation
The table below summarizes the activity for the Company’s asset retirement obligations:

 
For the Year Ended December 31,

 
2017
 
2016
Asset retirement obligations at January 1, 2017 and 2016, respectively
 
$
6,661

 
$
5,107

Accretion expense
 
677

 
958

Liabilities incurred
 
278

 
84

Liabilities settled
 
(711
)
 
(2,378
)
Revisions to estimate (a)
 
(885
)
 
2,890

Asset retirement obligations at end of period
 
6,020

 
6,661

Less: Current asset retirement obligations
 
(1,295
)
 
(2,729
)
   Long-term asset retirement obligations at December 31, 2017 and 2016, respectively
 
$
4,725

 
$
3,932


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