XML 35 R30.htm IDEA: XBRL DOCUMENT v2.4.0.8
Asset Retirement Obligation (Tables)
 9 Months Ended
Sep. 30, 2014
Asset Retirement Obligation Disclosure [Abstract]  
Changes to Company's Asset Retirement Obligations

The following table describes the changes to the Company’s asset retirement obligations during the nine months ended September 30, 2014 and 2013 (in thousands):

 

 

Nine Months Ended

 

 

September 30,

 

 

2014

 

 

2013

 

Balance at beginning of year

$

4,837

 

 

$

4,422

 

Liabilities incurred

 

411

 

 

 

276

 

Liabilities settled

 

(68

)

 

 

(119

)

Accretion expense

 

126

 

 

 

124

 

Revision in estimated costs of plugging oil and natural gas wells

 

19

 

 

—

 

Asset retirement obligation at end of period

$

5,325

 

 

$

4,703