XML 94 R30.htm IDEA: XBRL DOCUMENT v2.4.0.8
ASSET RETIREMENT OBLIGATION (Tables)
 6 Months Ended
Jun. 30, 2013
ASSET RETIREMENT OBLIGATION  
Asset Retirement Obligation

 

 

(In thousands)

 

 

 

Balance at December 31, 2012

 

$

67,016

 

Liabilities incurred

 

2,354

 

Liabilities settled

 

(757

)

Accretion expense

 

1,777

 

Balance at June 30, 2013

 

$

70,390