Quarterly report pursuant to Section 13 or 15(d)

Asset Retirement Obligations (Tables)

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Asset Retirement Obligations (Tables)
9 Months Ended
Sep. 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

 

(25,515

)

Accretion of discount

 

15,883

 

Disposition of properties

 

(965

)

Liabilities incurred

 

7,615

 

Revisions of estimated liabilities (1)

 

12,040

 

Balance, September 30, 2015

 

399,626

 

Less current portion

 

84,588

 

Long-term

$

315,038

 

 

 

(1) Revisions were primarily attributable to increases in scope of work, additional time to complete the work and from non-operated properties.