Quarterly report pursuant to Section 13 or 15(d)

Asset Retirement Obligations (Tables)

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Asset Retirement Obligations (Tables)
6 Months Ended
Jun. 30, 2015
Asset Retirement Obligation Disclosure [Abstract]  
Summary of Changes to Asset Retirement Obligation

A summary of the changes to our ARO is as follows (in thousands):  

 

Balance, December 31, 2014

$

390,568

 

Liabilities settled

 

(21,939

)

Accretion of discount

 

10,930

 

Disposition of properties

 

(965

)

Liabilities assumed through acquisition

 

2,944

 

Liabilities incurred

 

4,671

 

Revisions of estimated liabilities (1)

 

3,858

 

Balance, June 30, 2015

 

390,067

 

Less current portion

 

41,494

 

Long-term

$

348,573

 

 

 

(1) Revisions were primarily attributable to increases from non-operated properties.